Thanks for the reply leafo. I really want to use Itch.io as a platform for distributing my games and I'm having to be really careful with development so I can maintain my games in an accessible range. I know I can switch to another engine, (I'm currently using UE4 that has an experimental pipeline for HTML5), but I've invested a lot on it and I'm giving it a try. Enabling Gzip could really help the UE4 community as the files get really compressed.
Thank you the intention to try and prioritize it, it really means a lot :D
I'm always following the platform and love it!