These values are pretty easy to mess around with in SkyEdit too...I just made myself something of a combo of those two mods with super-tiny sweet spots (.3) for Master-level locks scaling up to near-vanilla for Novice ones, lockpick weight of 0.2 each, and double the skill level contribution to difficulty (so that higher skill makes for noticeably easier lockpicking and lower skill Master locks should be effectively unpickable). I'll mess around with it a bit, but my guess is that this will improve it a bunch for my taste. Now the worth of the perk tree is another question...it really should be folded in to Pickpocket or something similar.
If you are interested in changing pick rarity as well, it appears that most if not all of the loot lists are using LItemLockPick100, LItemLockPick75 and LItemLockPick25. I increased the chance none for those, and so far I am finding a lot less picks.
I personally wouldn't want to combine the Lockpick and Pickpocket trees. Pickpocket is only useful for thieves while Lockpick could be useful for any character. An alternative to getting rid of the tree could be to provide other means to open locks, like bashing and alteration spells. Warriors and mages wouldn't have to level Lockpicking or waste perks on it, but it would still be worth investing in for stealth characters since the other methods would attract attention.
The one perk that really needs to go is Unbreakable, it makes most of the other perks in the tree worthless.