John-
I'm not sure how much easier an electric winch would make launching, other than using the electric motor let the line out compared to taking off the ratchet in a manual one, but the electric retrieval would be nice, particularly when the crank up distance is longer or steep. As we get older, the appeal of such convenience devices becomes greater.
You could also use the electric control unit to allow yourself to move about more easily to check on and assist with centering the boat, etc., and the electric winch will allow the Admiral or anyone else less inclined to rely of muscle power to winch you aboard, such as when you have to power on to the trailer when there's no dock (float) next to the ramp, and someone else can attach the winch line.
One drawback of the electric installation has traditionally been that you have to tap into the tow vehicle's 12 v supply (hot wire) somewhere with a pretty heavy gague wire for the amperage required, but today's vehicles with factory tow packages already have a hot wire in their harness for such use.
I've almost bought an electric winch several times, but decided that the amount of winching involved on my CD-22 with a roller trailer and two speed manual winch is so easy to do by hand that the little gain in convenience wasn't worth the trouble to install and maintain it.
If you have a bunk trailer, as an alternative, you might think about adding one of those slick anti-friction compounds to the bunk carpets, or even the plastic slider strips that do the same thing. Be cautioned, however, that some folks find those to be so lacking in friction that keeping the boat centered on the trailer during the tow can become a problem.
If you do install one, you'll need to cover it when stored outdoodrs to keep the water out of the sensitive parts, of course. Be sure to also retain your chain and latch set up to back up the winch in case it slips, fails, or inadvertently lets line out becuse of some electical problem.
You may have to modify the trailer's winch post somewhat to accept the electric winch, but that shouldn't be hard. If you need help, a trailer dealer / shop can usually do it quite easily.
There are even some electric winches available today with wireless remote controls, but on a boat the size of any of the C-Dorys, this feature shouldn't be necessary. (Except for the Cats, at least until someone builds a proper trailer for them.)
My guess is that an electric winch with a 1500-2000 lb pulling capacity should do the trick nicely.
Good luch whatever you decide!
Joe.