JavaScript lets you listen for multi touch events just fine with touch starts, ends, and moves, and lets you keep track of each finger separately. What gestures would it not be possible to implement with that?
10 open, 40 closed issues related to gestures in v2. It has not yet reached release stage, but already good enough to start the development of the new apps.
Also v2 is not the best thing to point to because it's very new and I don't think many people are using it compared with v1. And closed issues don't necessarily mean fixed, eg: https://github.com/driftyco/ionic/issues/9052 -- I believe all WebView based apps suffer from the problem described in this issue.
Every new technology is used initially by less people than something older. It does not say anything about it.
Regarding the issue you've mentioned, I think it can be fixed by HTML/CSS means.