Honestly, Takemoto is a great director, possibly the best director at KyoAni and Shimo is a fairly decent writer. Shimo is a shitload better than Jukki Hanada. So the writing and directing seemingly have good chemistry with each other, as the works Takemoto and Shimo have done together have been highly lauded. I've been rewatching Fumoffu and it's really well directed in how Takemoto uses visuals to explain what people are thinking, nowhere near as advanced as Hyouka. There is a quick snippet in a recent PV that shows elements of that with the MC so I expect that to continue.
I have heard that the LN is a bit of a mess. Not so much in fanservice, which I really don't give a flying fuck about (not to mention people are taking the fanservice out of context). It's not like KyoAni hasn't done tons of lewd shit in the past but people have somehow become attached to their impressions of KyoAni doing non-lewd stuff like K-ON. The issues I've heard about in regards to the LN, have to do with the narrative being a bit aimless at times, as well as the pacing. It seems like however that KyoAni is doing an extensive rewrite of the stuff. How extensive? Who knows, although one of the key art images had many of the characters from the LN so I doubt it will be a completely new work.
The art direction isn't as strong as Hyouka but I doubt we'll ever see art direction and animation on that level from KyoAni ever again (in a TV format) or certainly not for a super long time. Also I doubt that it would work in a comedic series like AmiBri but whatever.
That said, the manga has a few good moments in there that I could easily see expanded into really great scenes in the anime. One being where Kanye is sitting down on a bench thinking and the other being when Kanye is chiding the employees of the park. He should make for a fairly interesting lead just because of how much of an asshole he can be.
So in short, I think it's going to be a bit more melancholic than what the PVs have portrayed and I do expect it to be good, despite the wailing of posters on this forum.