A blocksize increase doesn't fix transaction malleability or quadratic hashing or fix covert asicboost or enable use of lightning network. Also IIRC greg maxwel

A blocksize increase doesn't fix transaction malleability or quadratic hashing or fix covert asicboost or enable use of lightning network. Also IIRC greg maxwell has said the actual segwit code is like 2-3000 lines whereas the rest is testing.