USN CVE/VR ReplTFs are the greatest! in combo w/ AOs, you can support extended USN CV TF ops. but they are way overloaded w/ planes - the overload doesn't prevent them from flying replacement aircraft to in-range carriers, but they can't fly combat sorties of their own, so they'll be v. vulnerable. the VR sqns will train pilots normally, also they can be flown off to land bases, from where they'll still be able to provide replacements to in-range CVs. or you can split VR sqns into 3 parts, fly 2 off to land bases, and resize them as needed. max them out w/ pilots, for training.
i'm in a DBB_B GC, and CVE Copahee arrives at Tacoma in 8/42 w/ fighter & DB VR sqns. 3 more CVE/VR ships will arrive at Tacoma in 10/42, yum.
bradfordkay mentions a good point - VR sqn replacements must match the plane-type. you must make a decision about CV sqn upgrades, if you want to support the upgrade from a CVE/VR sqn, you might want to wait on the upgrade 'til production allows you to upgrade the supporting VR sqn.