Please help :) should i stick to ionic or switch to something else for crossplatform development? What do you use?

Are you using ionic to build a web app? Or are you planning on making an app that you can actually deploy to devices?

I've rarely seen successful "one codebase, multiple platforms" projects. You almost always have to take all platforms into their own considerations. Using ionic for deploying to the web has ended in major rewrites in past jobs because of all the funky things ionic does "for you" like scroll jacking and looking a lot like iOS style guides.

I suggest stick on ionic until you figure out a more good way to handle cross-platform.

I'm developing apps for android and iOS. Ionic2 is now in beta, that's the reason i tought i should maybe switch to something like nativescript instead of learning ionic2

Try NativeScript. It compiles to native platforms for android and IOS. Performance is 100% native while coding it like a web app.

React native from facebook is awesome for cross platform development.
I tried ionic , it just doesn't feel right.