I, as a long-time PvEr and casual PvPer, do not think the rewards have anything to do with 'saving' the PvP. Everyone points at the right question -
is getting into PvP worth it? - but gets to, imho, wrong conclusions.
What makes RA and JQ so popular, especially when compared to HA and GvG? Sure, it's much easier to 'master', but getting to high proficiency takes both time and effort, as well. There are cheesy gimmicks that everyone may take off from gwpvx...
oh, wait.
Well, first of all, you don't need other people to play RA and JQ. I mean - sure, you get into a group, but you don't have to form it beforehand, even if it means no monk in RA for seventh match in a row, or five sword warriors in JQ, two being bots. Still, wasting time for a bad game is much better than wasting time waiting for a game, eventually getting none at all. You don't have to organise eight people at the same time, organise their builds, build up communication... sure, those are things often liked by HAers and GvGers, but mainly because they got used to them already, and because they have a constant group to play with. That's pretty much why constant parties took over clans in L2, but that's a completely unrelated note.
So, we have the time. And, keep in mind, people who started playing even as late (?!) as 2007 are now four years older, which means more important school stuff, getting into job life, getting married, having kids and other time-taking what-nots. When i was in one of the PvP guilds - more about that later - i wasn't bothered by losing in the first or second HA map - the waiting, looking for people to fill up the party, organising everything up - that was frustrating. And not only for me - the r8+ Heroes weren't cold-blooded about it, either.
That leads us to people. When you encounter an idiot, a kid, say, a total noob - so that you'd give his brain to the scientists so they can find the missing link of evolution - in RA or JQ, you're pretty much free to flame him, yell at him, make fun of him - whatever. Sure, it's not 'fine' to do so, but you get the idea - you probably will never meet the guy again, it's not someone from your guild or your friendlist. It's just a random dumbass you happened to play with - not someone from
your team.
Everything changes when it comes to structured PvP...
So a rookie who played some RA and even got that 200 glad points wants to get into HA. Is it worth it? Rewards-wise - sure, the first ranks in the title don't seem too distant (even if, in fact, they are, the relatively small numbers are encouraging). The rewards from HoH chest seem good, with the minipet being simply awesome. Heck, even the bigger competitivity of HA is a reward itself for many.
What can the rookie do? He needs people to play HA with, and he can't really pug with r2 glad. So he joins a PvP guild, stating that he never played HA and is looking for someone to take him along, teach him, have fun together. Sounds obvious.
Let's say that at least 'some' guilds, that agreed to invite a non-experienced PvPer-wanna-be, never really take him along to play. They have their core team, and if the core isn't present, they often prefer to pug r6+ than take a newcomer with no HA experience. And if our rookie finally gets into the game, there are several scenarios. The most possible one is probably that the team loses several times (after all, if they took our rookie, they probably weren't all r9+, more like a r5 'mentor' decided to take youngsters out, fill the group with pug), and then it gets disbanded. Our rookie can't pug another group, and starting his own guild for rookies is not a viable option that late into the game - the old PvPers will just wipe his team in seconds, not letting them to learn. So he can't do anything if the 'superiors' from his guild are not kind enough to let him play HA, being nice and helpful, let him try different roles, let him learn.
With people like - amongst many, many others - Lemming, Urania and Reikai, is it really worth it?
TL;DR: that late into the game, HA doesn't need more item rewards, but more possibilities to get into it without having to cope with elitism in the first place. I guess GvG has similar problems, as it's structured, with pre-made party of 8 people, and has waiting times. It's not small rewards that scare people off, but other people who already have dominated the format.
Some time ago, i have proposed, along other things, to break HA into 'lower' and 'upper'. Only r0-r4 people allowed to play the lower variant, only r5+ people allowed to play the upper variant. Remake the rewards accordingly. Make noobs fight noobs and learn from it. It would revitalize pugging, thus making PvP friendlists and new PvP guilds. The problem is, are there enough HA-wanna-plays to fill the lower variant?
And, is it worth it?