This would be way OP IMO.
No feat is worth a class level and no two feats are worth three class levels.
Consider:
1. Weapon Master gives you +1 Strength or Dex and mastery in one weapon you are already proficient in.
2. Moderately Armored gives proficiency in medium armor and a +1 dex or strength has a prerequisite that you are already proficient in light armor
Compare to:
Paladin Initiate: you get a casting level, 2 prepared spells, proficiency in all martial weapons, proficiency in light, moderate armor and shields, lay on hands, two weapon masteries in any weapons and a +1 in any ability you want
Fighter Initiate: Light, medium armor and shields, martial weapons, 3 weapon masteries, second Wind, +1 in any ability you want.
Cleric initiate: Proficiency in all armor and all weapons, +1 in any ability, a caster level, 3 Cantrips, 4 prepared spells.
