Well, similar to the reactions on here it mostly depends if a clause exists.
Without a clause the reactions range from "What the hell are our offcials doing, damaging our reputation to develop a player for a bigger club" to "Meh, at least a good squad option for little money" (probably the biggest camp and the one I´m in too).
With a clause the reactions are of course positive. This would be a dream deal for us, not other ways to describe it. We get one of the most exciting talents in Europe who also fits Tuchel´s profile without taking any risks. We can try him out for a season and then determine if he is worth the sum of the buy clause.
His chances on the pitch are also largely dependent on how long he might stay. Without a clause he is mainly a cover and sub option, which would impact his game time negatively. With a clause I expect Tuchel to give him plenty of chances and introduce a higher rotation amongst the front four and given the fact that Tuchel also sees potential in Reus playing upfront, there will be more than enough space to fit Adnan in. He will be in a position to pressure the current starters to keep their level up and if one of them slips up in form (bar maybe Reus because of his importance and impact even without top form) or gets injured he could find himself starting in nearly every game for us. It will also depend a bit on the opposition.
Januzaj is more than a pure talent and potential at this point, still far from being a finished article but at the same he should be able to add something to our game which we don´t have right now to such an extend. He is a left footer, which is something Tuchel clearly wanted and versatile, which is highly rated by the coach. His passing game is clean, his technical skill on the ball very highly advanced which allows him to beat defenders quite frequently. He has probably more of an individualistic approach to the game, which also helps us because the other offensive players bar Aubameyang tend to be more on the more selfless side. I could see him opening a lot of spaces with his runs. He probably lacks the most in terms of goal threat (thus not being a real option as striker in my eyes) and decision making. Regarding this last part he might profit a lot from Tuchel, though, and I could see him make quite a jump in terms of development in this season.
Don´t forget for what little money they gave us Kagawa back
.
I also see a falling out with van Gaal as the only logical explanantion for this move. With or without clause I really don´t see the reasoning of United behind this deal (or at least of the destination), which is why I deemed it so unlikely just a few days ago.
Time will tell I suppose. I expect a Röckenhaus article regarding this matter soon, which might give some insight in the matter. I also think that the way Adnan will be used by Tuchel will tell us a lot of how long we can expect to stay with us.