I would not worry too much at all about the display. It's a minor annoyance and it doesn't move very much. I also tend to ride on rougher roads and gravel so my riding locations are conducive to a lot of shake, rattle and roll. The front light, on the other hand, does drive me a little nuts. I'd like to remove it and replace it with a decent after market light, but I do not see a way to detach it cleanly given the internal wiring.
Personally, I have no interest in messing with the chainring and belt. Clearly, a lot of thought went into engineering the super riding characteristics of the Current and I'm from the "if-it-ain't-broke-don't fix-it" school. In other respects the Current could do with a little refresh. In addition to the mounting bug-a-boos I mentioned, newer bikes in this price range have beefier batteries, and while I'm glad I purchased the extender battery, it's clear the design was a retrofit. I prefer the extender on my Omega as it draws current in alternating increments from each battery, so the integration feels seemless. With the Current I'm always watching to make sure the extender kicks in. (It does).
Also, while I actually like the no-nonsense and easy-to-read display on the Current, newer bikes have gone to slicker color displays (although not necessarily better. A friend had a recent incarnation Aventon which was conspicuously missing an on-demand trip odometer so he returned the bike).
I also really love the mid step design of the Current, which for my aging bones, is a perfect compromise style frame. I can understand why some prefer a pure step through or step over though.