So you went from demeaning Gundogan to demeaning me by saying I'm not deep enough into football to see subtle plays?
There are things that Kimmich doesn't hold a candle to Thiago, agreed. Passing, technique and creativity are things Thiago is better at than Kimmich and in the top tier of midfielders. But Kimmich does still have those at a high level himself, alongside great defensive skill and, most of all for me, fantastic leadership and mentality. That is one thing Kimmich has over Thiago, and something I consider has negatively impacted Thiago's game.
I was skeptical of Goretzka as well when he joined, he looked brilliant as an 18 year old in his first season at Schalke but then injuries did push him back. His first season at Bayern wasn't particularly impressive as well but this season he looks a different animal. He is physically in much better shape, you can clearly see he has built up a bit of muscle this season, and he seems more confident playing for Bayern. He's an average passer, average technically, but his ability to score and create goals is something unique that no other Bayern midfielder has (and hasn't had since probably Kroos back under Heynckes).
You're right that he's struggle in tight spaces, but that's where I feel Bayern can have a bit of variety to their tactics. Why do you want to control and dictate every game? Under Heynckes, Bayern's peak since probably the 70's, Bayern were able to control games against weaker opponents but also sit back and counter against technically stronger ones (Arsenal, Barca). It was the dual strategy that made them such a great European team and better than Pep's, who had just one way of playing.
With Goretzka and Kimmich, you have the ability to play dual tactics. Against weaker teams, where they will allow you to hold the greater amount of possession, you don't necessarily need a great technician in midfield as the opponents won't press heavily. Kimmich can certainly play the role of a deep playmaker in those matches. Also, Goretzka gives you an added goal threat from midfield, which he has shown consistently this season. When you play against stronger teams, you can sit back and allow them to dominate possession, in those situations you rely more on countering them and Goretzka is a great B2B player in that respect. He can sit deep and defend competently, while then breaking forward with his speed and get into goalscoring positions.
It's interesting to say the least for me. I'm really liking what I've seen from Goretzka this season and his goalscoring from midfield adds an extra dimension.