Nice work on the map, just some of my initial thoughts from jumping around exp b18, though I'll update this if my team scrims it before the season starts. I do like the change to the left entrance making it transparent, though I think it'd be cool if you made it where you couldn't check all of the cellar through the left grate, just a large/significant portion of it. Idk if back caps were something people commonly experienced on this map though.
Kinda iffy on the changes to second, obviously w/o playing it it's hard to tell but I do think it makes holding second a bit harder, which I think was already a challenge inherent in this map. Without the little platform on second, the area feels a bit no man's land/barren, and I think the positioning a defending team should take just gives too much free space to attackers. Also, it makes the roamer fast rollout significantly harder (admittedly biased as a roamer main). I think the ramps up to the second point is nice, but IDK how you would keep that and the platform w/o cluttering it up. If you keep the changes to the ramp/rock by the fountain on second, the only thing I'd say is to make that fence a bit higher so soldiers could bomb off of it into second as otherwise, the fountain seems a bit useless when pushing into second.
I feel like I'd have to play a game to get a feel of what the ramp to books would be like, or the improved ledge on mid, as it seems to stuff choke and books more.
Otherwise great work!