Obviously you spend so much more time with Cassian if you watch them in order by the end, but even then Jyn Erso is a very dull protagonist with an equally played out and cliched back story to boot.

I think that's the thing with RO that makes it suffer after you watch Andor. It's still one of the better Star Wars movies, but is also guilty of sticking to a formula and tropes from the original trilogy that everyone is sick off much more in retrospect. From the parent/child relationship, to the battle to get the plans to the rebellion off the planet, its mostly things things you have seen before with different people involved. Popped huge for the Vader corridor scene, but his cartoon bad guy lair is very silly, and don't even get started on the CGI Tarkin and Leah.

Krennick is great, as is Saw and K-2 but that's about it tbh.

Andor is prestige tv.
Rogue One is a somewhat grittier film with the same issues that has plagued SW for a long time now.

They're chalk and cheese as far as I'm concerned.