I've not watched TTGL, though I plan on getting around to it soonish, so I don't have that frame of reference. I'm not saying that the show will be subversive because of the depth. I'm just saying that the way I read the first episode (taking the piss out of the tropes it is using) tells me the direction the show is going to go isn't going to be quite as straight forward as it appears at first blush. But I don't know for sure obviously. Lots more show to watch.
I'm sorry, but this screams reading something into the material you want to be there rather than it actually being there. Also, defying expectations is not the same as being subversive. Subversion requires a sense of subtlety, which no offense to Imaishi, is the one thing that he has a director definitely does not have.
Not to belabor the point, but how does it make sense?
Someone who likes fanservice and sexy cosplay has no issue with the fanservice in this show. Nothing to be surprised by there.