TwoSix
Everyone's literal second-favorite poster
I don't think that's quite as crazy as it sounds. It sounds like the style of play is more of a classic Gygaxian dungeon crawl, or a focused adventure path. In that kind of game, there's a metagame challenge of diversifying your party to cover all sorts of possible challenges. If the encounters in the game are built to the character's abilities, then that metagame challenge is lost.Wha? The player makes a choice with limited and irrecoverable build resources and you say acknowledging that choice is removing player agency?!
It reminds me of a lot of old school video game RPGs. In general, building a balanced party was the best approach, but there was a lot of fun to be had by building a non-standard party with lots of weaknesses and seeing if you could beat the game that way. (See: 4 white mages in Final Fantasy 1.)