Fine for me. More options is good.
I personally try to avoid as much is possible splicing. Splicing should not be used at regular basis, but only when is really needed it, as submarine swaps. Unfortunately many users do not understand well how to use them properly and abuse their use.

I also try to avoid as much is possible any onchain payment. I use onchain exclusively for opening/closing LN channels and sometimes swaps.

I do not think I will "join" into a multiple transaction with a splice just for the sake of using that "coinjoin" tx and save few sats. But if I really have to do a splice and the wallet app automatically find a "joined" tx with others and as user I do not have to do anything else, I don't mind. As I said many times: coinjoin for me is in the past, I do not use it anymore. LN is much better in terms of privacy.

I've said many times: through a single LN channel you can pass by infinite amount of sats, infinite coinjoins without any trace onchain (except the opening/closing amount). But seems that many people still do not understand this LN "feature". The smart thing is to avoid touching onchain not to coinjoin over and over.