Alot of application already running in ethereum. Ethereum network is getting heavy
That is true but they are also working to scale the network and improve it. So i wouldnt worry about it
problem is how fast are they gonna roll out the fork to improve the network? people might jump to a different blockchain if something is not done.
Actually, if ethereum network can't cover the activity on it, tokens easily switch to another chain.
Just a token swap with new chain and it is ready to go. So the problem only ethereum's own.
There are indeed many other promising projects coming with similar feature, providing supports for tokens, indeed.