For the last time, no.
You're the one constantly talking about 'power-gaming'. Im working off the following assumptions:
1) You cant 'power-game' custom lineage. In power it's roughly equivalent in Power to Vuman or any of the other default Races.
Compare:
High Elf
+2/+1
Darkvision
Perception
Advantage on being Charmed/ cant be put to sleep
4 hour Long rests
Proficient in Swords and Bow
Free Wizard cantrip
Bonus language
Custom lineage Elf
+2
Darkvision or a Skill
Feat
That Feat (to draw equal to the base High Elf) would need to be the equivalent of +1 to an Ability score, a Skill proficiency, 4 Martial weapon proficiencies, 4 hour short rests, immunity to sleep, charm resistance, a bonus Cantrip and a bonus Language to match the 'standard' High Elf.
Which would be a pretty broken Feat! In exchange for all those goodies, you get some ability to customise your PC.
How is 'Normal High Elf' broken or power gamed compare to Custom Lineage Elf? If I offered a half feat with those benefits:
Elven blood. The blood of the Elves flows through your veins. You gain the following benefits:
- +1 to an Ability score to a maximum score of 20
- You gain a Skill proficiency,
- You gain 4 Martial weapon proficiencies
- Long rests only take 4 hours for you
- You have immunity to sleep, and advantage on being charmed
- You gain a bonus Cantrip from the Wizard list
- You gain a bonus Language of your choice
Most so called 'Power gamers' would take it in an instant!
There is no power gaming here, and nothing is broken with this rule, and if your table is full of players who would try and twist this rule to 'power game' something outside the spirit of the rule, you have bigger problems going on than Custom Lineage.