Please keep CI4 simple just like the previous versions. Laravel enforces way too many conventions, which is a pain in the brain. If one convention fails, the entire app screws up and lets you end up in a lot of document reading instead, which takes a lot of down time. Clients really hate down times. I hope CI4 styles will be similar but with a bit more modern syntax, modern loading mechanisms, performance, structure through PSRs and a few add-ons like template engine. Don't do too much of those facades, service over-kills, contracts stuffs. If there are any like the deferred objects, keep them simple. By the way too much convenience methods just adds to the confusion --stick to one method that works nicely.
Long live CodeIgniter!