I don't like the idea personally. I think the game offers enough interesting options for lvl 1 already. Also the feats the OP mentioned are kinda lackluster for your main character, but are very good for companions. Weapon Master is one of the strongest options in the game now, for both Wyll and Gale, because you can get 14 DEX and a proficiency with an almost OP hand crossbows and several other light finesse weapons. You'll never worry about how to use your bonus action again. Shadowheart can benefit from Mobile, because all of her attributes are EVEN, and lacks mobility as a cleric. She can also go for the magic initiate cleric or druid to use shillelah and thorn whip effectively. Skilled is very good on a skill monkey human/wood-elf PC. Those feats are very often overlooked just for the sake of +1 on rolls you can get from ability improvement.
