CPA is very complex, so yes, they could, for one reason or another. That's why you always need clear endplan before messing with your regime, as well as patience, to avoid dangling around like a poop in an ice hole.
If you plan to replace CPA with Bica, i think you can do it cold turkey, but you need a loading dose of Bica. So 50mg Bica for first week, than 25mg for a week or two, than you can try lowering it even further.
If you plan to drop AAs in general, you need to taper off CPA really slooow. So first you go 12.5mg EOD for a week, than every 2 day for a week or two, than every 3 day. That should be enough.
Also, as I already mentioned, 12mg/10d E is unreasonably high, 10mg is more than enough and 11mg is max. Guess you can fix it when your hair stabilize, but too high of a dose can cause issues by itself (mainly prolactin).
Im on vacation btw, so gonna be off for some time.