it would be really nice (and epic amount of work -.-) if you would optimize all the models. there are tools for it. but for one model you need to do 2 click + opening model + export&import = a lot of work. it could significally reduce the total filesize. (pm me if you are interested and wantmore info or something). if you dont have the time yourself, then request the labour from someone else.
if anyone is going to make a playable map, then they might find this attached zip interesting, maybe you could include it in the next version, no credits necessary.
since w3 has a minimal size of 2x2 pathing textures, you cant make very hd pathings. what i did was every possible combination of unbuildable* and unpathable in a 2x2 block. if you are going to include these, base them off the normal pathing blocker, its basically the same thing (extended functionality).
each of these pathings takes up
1kb and theres 14 of them. so quite useful imo.
*there isnt a real difference if i make it unbuildable or buildable, since no building is able to utilize that space. the only difference might appear, if someone is going to use a custom summon or build spell, which has a condition of that point being buildable. with regular build skill and regular building there is none.
oh and you could add this to the map section

. i always forget that it is here...
EDIT: /facepalm
forgot to add the zip xD