here is my 2 cents -
Yes lockpicks are all about hardmode if you're considering value, only the highest level areas/chests in normal might be the exception.
As it's the only way to open hardmode chests, it is the universal hardmode key. Frankly I'm sure the biggest reason it came to be was because they never made things like keyrings and wouldn't it have gotten utterly ridiculous, now having this reason to span all chapters and areas and not in linear fashion, to have us manage the unruly key mess that would have followed.
Part of the goofiness with this stems from how titles work. Salvaging, and now lockpicking, get bonuses from titles on individual characters only. To build this up individual characters need to be opening up the chests, identifying the golds, or going AFK for days to get winning tickets...
This means for such an open-ended rich game with many characters you're funneling a lot of goods and play time to one character, and that character will be the most effective, even though all your 20 level characters have access. That's one reason I didn't get into the salvage insanity - at least that base was 50% so although those putting the [crazy?] amounts of time into it would get real value, I already do more than enough item jockeying.
But now another one has come along, lockpicks, and only a 10% base. Ouch. Even modest gains (a couple levels of luck and treasure hunter) double that number and you go from keeping a lockpick 1 in 10 to 1 in 5. But what does that mean? Are you ready to have a primary hard mode hunter?
So many titles and their mechanics and effects don't work for me in this game. I'm 'functionally' driven so maybe it's just me but lets look at a couple.
Skill hunter - why on earth do you have primary skill elites from other classes? There may be some rare exceptions but that's the most dramatic, most secondary elites will never mix well. We already have a title that rewards silly skill capping on a character - it's called Survivor (3). Skill hunter to me means you didn't have anything better to do.
Luck - I mean come on, afk ftw? I never considered going after such a lame excuse of a title to be 'proud' of, but now I too will have to hope I can leave my pc and internet connection on indefinately [maybe that's where the luck comes in?] so I can score better lockpick results on one character. Yay?
Treasure Hunter, Wisdom - again drives usage through one character and encourages mindless activity that ANet tries to discourage (treasure runs) and arguably an odd marketplace, sell me your golds so I can ID them. Yah.
Well I got a little off track but I wonder what GW2 will bring, these are steps I don't get. Sure they want us to grind more, but we're not paying monthly so we don't need to be utter grind crazy. A lot of this should be across account - I brought up new level 20 pves, is it really a great game mechanic to make me wonder who should be opening chests, IDing the gold, salvaging, sitting idle in town for tickets for days, using lockpicks - playing hard mode?
Class diveristy has some interesting ideas but in the end you have many people keying on loot so you have to be careful. Per the OPs post you're best move is an Assassin solo artist - that's the only one with a real bonus that has to be ployed in the adventure areas. After you bought your lockpicks with your mesmer. And salvage with the right character per the list.. I mean omg no offense but I absolutelyu hate that idea. As you'll note above, I already object to having to do this kind of thing based on individual titles, you want to make it class based [as well] - and yeah it's not balanced.
clawofcrimson I do like some of your thoughts, also it suggests some new better across-account titles - personally I think it's much more useful and worth a title if you've played/have all pve characters and took them to completion - here it might include the different paths/avenues you had to take. Skill hunter should turn into you have all skills/elites for all classes on that class, which makes a heck of a lot more sense. Heck my Ele has a LOT of 2ndary skills and elites used to great effect, but I let my other primary classes produce the bulk of their unlocks. [exception of course being chp1 release, only 4 slots - 3 characters unlocked all for their primary/secondary]
I think we'll get some differentian in GW2 but not by classes but more by race with abilities. Maybe I need to dig into that, I didn't get the PC mag, but frankly I don't have the PC for it either heh. I just hope they refine their title -> bonuses and consider more cross-character as it can end up driving some goofy gameplay choices such as funneling and what char plays an area.