VERSION 0.41 NOW LIVE

Better Perks mod improves the perks, that i felt were underpowered or just useless in vanilla. Also removes level requirements of affected perks (S.P.E.C.I.A.L. requirements remain).
This is fully modular, so you can install only what you want.
Tested on english version of Fallout 4. Altered perk descriptions are in english.

Consider this beta version. few perks are affected so far. There is non-zero probability of adding more perks to this mod in future versions. Endorse and stay tuned.
WARNING! Install only one version of each plugin if there is an options.


BETTER PERKS - Big Leagues
NOW PROPERLY FIXED!
A lot of people complain that Big Leagues perk decreases melee damage at level 5 instead of increasing it. And rightfully so. This plugin patches it.
Level 5 Big leagues now properly gives you double melee damage as perk description suggests. 
Better Perks - Big Leagues.esp
Better Perks - Big Leagues - no cap.esp - optional file removes level requirements(again install only on of these).

BETTER PERKS - Strong Back
Ever felt like taking each piece of junk, every pipe pistol and rider armor? Now you can!
Multiplies carry weight bonus for Strong back and removes level requirements.
Also levels 3 and 4 of this perk are merged so it has total of 3 levels.
There is a 3 versions(use only one):
Better Perks - Strong Back x10.esp- Standard increases level 1-2 effect from 25/50 to 250/500 I think it enough to justify point and not too OP.
Better Perks - Strong Back x20.esp- 500/1000- for those who need just this one extra item
Better Perks - Strong Back x100.esp- 2500/5000- because why not, right?

BETTER PERKS - Toughness
Better Perks - Toughness x4.esp
Changes perk's armor value bonus so you get 40 per level instead of 10. Removes level requirements.
NOTE: it wont make you 4 times more armored. Actual difference between 50 and 250 armor points is 30% on average.
For example taking 100 damage with 50 armor results in -64 Hit Points. Taking 100 damage with 200 armor results in -39 HP. If you wear X-01 with 1940 armor you take 16 damage in same case.
It's not % results a various depending on damage amount. Generally higher per shot damage amounts get resisted less.
This perk also cumulative with Power Armor, however there is no noticeable difference even between 1500 and 3000 armor. It may help when certain body part isn't covered by PA.

BETTER PERKS - Life Giver
Better Perks - Life Giver x2.esp
You now get 40 HP per level instead of 20 and regenerate 1 HP/sec instead of 0.5 at max level. Removes level requirements.

BETTER PERKS - Rad Resistant
Better Perks - Rad Resistant x5.esp
Improves magnitude of radiation resistance given by the perk to 50/100/200 points. It's no Hazmat suit, but it's something.

BETTER PERKS - Locksmith
Better Perks - Locksmith.esp
Merges levels 3 and 4 of the perk along with effects, perk now has 3 levels total. Removes level requirements.

BETTER PERKS - Refractor
Better Perks - Refractor x4.esp
Changes perk's energy resistance value bonus so you get 40 per level instead of 10. Removes level requirements.

BETTER PERKS - Nerd Rage
Better Perks - Nerd Rage.esp
Increases damage bonus while effect lasts to +25/50/100%. Which means double damage at last rank. Resistance unchanged. Removes level requirements.

YOU CAN INSTALL ANY OF THESE PLUGINS IN ANY COMBINATION OR ORDER

INSTALLATION:
1. Put '*.esp' files in '\Fallout 4\Data\', or just merge 'Data' folder from archive with your FO4 Data folder.
So example path looks like '\Fallout 4\Data\Better Perks - Strong Back x10.esp'
2. Activate it with launcher by clicking on right cheek of Power Armor face.
Or add the line 'Better Perks - Strong Back x10.esp' to plugins.txt
Find it here '[C]:\Users\[YOUR NAME]\AppData\Local\Fallout4\plugins.txt'
NOTE: If you are using other perk mods put this one below in the 'plugins.txt'

EXAMPLE OF plugins.txt WITH FULL INSTALLATION:
You can copy this to plugins.txt, or the lines you need.

#Better Perks
Better Perks - Big Leagues.esp
Better Perks - Locksmith.esp
Better Perks - Life Giver x2.esp
Better Perks - Rad Resistant x5.esp
Better Perks - Strong Back x10.esp
Better Perks - Toughness x4.esp
Better Perks - Nerd Rage.esp
Better Perks - Refractor x4.esp

COMPATIBILITY:
No problems encountered so far. Works with similar mods. Just put this mod later in load order.
NOTE: Effects of some plugins may not immediately take effect on existing characters if they already have said perks. (This is irrelevant for Big Leagues fix.)
NOTE: Untested with Far Harbour DLC.

CREDITS:
FO4Edit creators for tool used to make this mod.

MY OTHER WORK:
Vault Suits add SPECIAL Stats