Like the energy!
It'll be the furthest thing from a perfect ending as everyone rightfully expects, and I meant this in a more lighthearted manner in that as long as the finale ties up a few of the loose threads and makes an effort for proper resolutions in the time that it has, it'll be enough for the readers that stuck around. It's like the "warm heart" approach that Airi-sensei wished for.
My brother in Christ... in 135 chapters how many "warm heart" moments we had? 2, maybe 3... and these last chapters have been... not good at all (Shifumi clapping being the exception), not horribly bad. Just "uh, is that it?"
Here's the thing, romcom is supposed to be fun, to leave you with a light, pleasant mood. That was almost never the case with Grapara. It was either "ugh" or "lolwut." The carrot was always Shinobu and Sakura will face adversity and will overcome. Peeps came back because they were invested in those two, AS YOU KNOW FULLY WELL! WINK!
KA managed to kill all that and didn't even had the grace of "fuck, that didn't go as I expected. Oh well, win some, lose some. I guess I will give these good folks that have been buying the chapters and the tanks a nice, simple, romcom ending. I'll put my fetishes in doujins next time..."