if they hadn't wasted so many chapters on 3 out of 13 total light novel volumes, the artist might not have lost any and all motivation. like the whole war arc could've been summed up in like 5 to 10 chapters without the reader missing any context whatsoever. not to mention this is a rom-com first and foremost, what's the point of wasting almost 40 out of 68 chapters on boring fighting lol
if they had introduced the other two girls already, things wouldn't have ended on such a sad note.
light novels are way longer than manga and have a lot of pointless bla bla that's hard to adapt to manga to make it interesting. and i literally said the artist resumed drawing porn immediately after dropping this series lmao
meaning if the series had remained the comedy fun with occasional ecchi elements that it was in the beginning, then the artist may have continued.
They "wasted" so many chapters as you said because thats what the author wanted, for a good adaptation, the artist was already burned out long before starting to adapt the 3rd LN volume, but the start of it was basically where she decided to stop and had already talked to her editor about getting a replacement, alot of this serie is about mech fighting, thats pretty much on the author as he love his mechas in his series
The next artist want to focus on the mech fights too, is basically what they mostly draw, are you going to cry once the next part start that they are wasting too many chapters on pointless fighting too?
And Shiosato Jun "resuming" porn is whatever, her new work started long before she dropped mobuseka as a pixiv and later fanbox, just recently it got serialized anyway, whatever she wants to draw next is up to her