If you want to become a Nxt Core developer just join the forum an speak out loud
Well, if you want to compare NXT with ETH, then compare this:
NXT repo:https://bitbucket.org/JeanLucPicard/nxt/overview6,446 commits
ETH repos:https://github.com/ethereum/cpp-ethereum11,974 commits, 14 releases, 70 contributors.
https://github.com/ethereum/go-ethereum6,984 commits, 80 releases, 63 contributors
And the above ETH stats are just for 2 of the many Ethereum projects.
Edit: I fixed the numbers, as I refered to the wrong repo.