... the eyecups on the 7x35 Retrovids are too small for me
I too found the eyecups terribly narrow. That was the deal-breaker for me. I tried to use some add-on wider eyecups, and while the situation improved, they didn't work that well and just got lost. Such a pity, because I simply adored the view, the contrast, the size, the shape, the weight. Mind-blowing, really. Such a pity. I'm surprised that, since they had to rework the eyecups (the original were simply fold-down rubber) they couldn't come up with a better solution. In my case (and it seems in yours too) they simply lost a customer.
EDIT:
Every time I remember about the incredibly narrow Retrovid 7x35 eyecups I get a bit mad/sad. This time I got curious and recovered a picture of the diameter of both ocular lens and eyecup I took for a thread
here (comparing the Retrovid 7x35 and the Swarovski EL 8x32) and have just compared it to the eyecups of a "pocket" (albeit on the bigger side of "pocket") contemporary pair, the Zeiss Terra 8x25. And surprise, surprise... (Terra 8x25, top, Leica Retrovid 7x35, bottom).
It turns out that both the 8x25 and the 7x35 have the same eyecup diameter, a meager 33 mm. Of course, you could understand it in the case of the compact, and it's probably not such a bad value in that format, but a 35 mm with the same eyecups as a 25 mm is probably something to be concerned in my opinion. The ocular lens itself is a bit wider, the Terra 8x25 has a 18 mm lens while the Retrovid 7x35 has a 21 mm, but what really kills it for me is the 33 mm outer rubber cup (compared to, say, the 39 mm of an EL 8x32 or the 38 mm or an Opticron Traveler ED 8x32.