That would destroy the entire purpose of the team. The only reason kakashi got team seven was because it was just like how his team was. If hinata was on team seven then that'll mean Sakura would be ln team what? Six? Also there's no way tsunade is training hinata, defeating the sannin purpose. IDK Naruto is the happy go lucky type, hinata is the shy type (back in part one) and sasuke us the cold yet cool type. I'm not even sure if that goes together but whatever. At least Naruto would've been with hinata much sooner and sasuke would just have...karin? I think, more or less? Dream team is still sasuke, lee, and neji. Everyone is getting wrekt.
No, no and NO.
Kakashi got the Sharingan user as the only even slightly reasonable reason behind getting the team, if at all.
Hinata OR Sakura has nothing to do with it.
Sakura would be under Kurenai, which would enable her to actually become the genjutsu expert she was hyped as in P1.
This would be one Sakura I would actually like, given her ability to manifest the Inner already.
She'd become the more canon Yakumo, lol.
The Sannin purpose is pretty secondary anyways, plus, there's zero logic preventing Tsunade from training Hinata, given her clearly good chakra control as a Hyuuga.
If anything, Tsunade training Sakura-the-nobody of all people, is a clear asspull based solely on PnJ, which is typical for Sakura throughout the series.
Being on another team, might actually benefit Sakura even with Sasuke - who'd be more inclined to stay in Konoha without being annoyed by her fangirlism, yet being able to connect to her the same way Naruto and Hinata did in canon.
Also, Kurenai had all the chances to turn Sakura into a competent kunoichi pretty fast, while Kakashi never even bothered with it.
It might lead to much quicker and BETTER NaruHina AND SasuSaku in the end.
It was never a question of making the STRONGEST team (which you might be right about) - but rather a BETTER PLOT and CHARACTER DEVELOPMENT.
With THAT in mind, Hinata on T7 and Sakura on T8, is quite the best solution there can be for the CANON Hinata and Sakura.