I use it non-custodial mostly, everyone is responsible of their stack and do wath they want. Lightning enable a lot of txs sub 100 sats, like zaps, that have much sense to do custodially because who cares of so little stack. Also with ecash we now have private way to do totally private custodial txs with 1 sat fees, perfect for this use case.
For higher stacks I assure you that non-custodial ux is fine, maybe need a lot of improvenent, but I use it and theres no particular skill you need to have to start with something like phoenix.