I used the trial to get all the fruits and do a couple trades (mostly swapping DIYs), after I realized I wouldn't be able to get them playing purely offline.
I've been on the fence about paying for the membership (my S.O. would likely benefit too). The cost isn't an issue, I just don't feel like I need it? My reasons are similar to
@Skyfall. I'd like to have all the black antique furniture, sure, but I'll just keep shaking trees and popping balloons until I get it! (Just for example)
And like everybody else, I want the dev team to add more items, but I feel like working with a more limited selection actually forces me to be more creative and break outside of my box a bit. If we had all the old NL furniture I probably would end up rehashing a lot of the same ideas. Same thing with having a slow and limited item selection without trading online - I have to, or maybe get to, work with what I have.
(Also I wouldn't trust myself to pace myself on seasonal items and it'd just spoil the progression for me, lol. I know my limits.)