I have a front-zip without the telescoping torso, and while it is certainly not the easiest suit to get on, the TLS isn't necessary.
If I could do it over again, I probably would go with a back zip to minimize any extra length in the torso, make it easier to roll up, and make it easier to get on since I probably couldn't get mine on by myself, anyway.
My bad. I should have said "some extra torso length is necessary." The Nova has that, even without the TLS option.
Some other membrane drysuits are stretchy (e.g. the Bare SB, I think). Those can be made to fit and be donnable, without including telescoping or any extra length. If the suit has no stretch at all, and if it fits correctly and has a front zip, it pretty much HAS to have some extra length to be able to get over your head.
Neoprene (compressed or not) does not need any extra length as the stretch will accommodate getting it over your head. At least, in my limited experience...
@JohnnyC pretty much nailed why I would always get a telescoping torso in a non-stretch membrane suit - even over the Nova non-telescoping design.
I will also not buy a back zip. I have had 3 drysuits now. All with a diagonal front zip. I have always been able to don my own suit without any help, including now with my Seaskin. I would not give up that ability. I kind of like the TLS anyway because the design means it can still fit well whether I'm wearing only a base layer or a thick undergarment. With the Bare suit I had (compressed neoprene), it fit well with a base layer, but was a bit snug in the crotch with a thick undergarment. The alternative, of course, would be a good fit with thick undies and being baggy in the crotch with only a base layer.
Seaskin has some tips on donning the Nova, including how to get it zipped by yourself. Though this is my 3rd front zip suit, I still found their instructions helpful.
Drysuit Tips - Seaskin Custom Diving Suits
Also, one other tip: I stupidly assumed that my plastic zipper came lubed from the factory, so I didn't need to lube it myself right away. I am a total slacker and have had it and been diving it for over 6 months now (though only 17 dives in the Seaskin) and I just this week lubed the zipper for the first time. It really slides a LOT easier now! Also, with a previous suit (also plastic zipper), I think the instructions said I only needed to put lube on the zipper down at the dock area (the end where it fully closes). The current instructions had me put a dab of lube on each side every 10 cm or something like that. I was REALLY surprised how much easier it slides after lubing it per the directions.