Any project that crawls to a halt because it’s missing cosmetic features is arguably a project that needs some re-thinking either way. Sorry if that sounds rude but I’m really tired of people claiming that features like these are of GROUND-BREAKING IMPORTANCE when a) 99.99% of those same people don’t have the technical know-how or resources to actually make a game with AAA realistic graphics that would justify the need for, in this case, dynamic GI and b) hundreds of AAA multi-million dollar successes released and sold without dynamic GI. I have never heard anyone say “Oh gee the gameplay of this game is amazing but I can’t really recommend it because it just doesn’t have dynamic GI”.
By all means, please go and shift your project to Unity, their entire business model is advocating fancy features that have never been proven to work in the real world and most people don’t actually need but lack the engineering experience to realize it.