There is really no point to invest much time and money to support something what doesn't solve anything at all.
I disagree with you, SegWit fixes transaction malleability and allows use of payment channels for example.
Even the segwit fees are now in avg higher than the non segwit before activation.
Fourfold increase of block size is much but not enough at mass adoption stage. Bitcoin needs on-chain scaling like this
https://bitcointalk.org/index.php?topic=2381234.0 . Or altcoins can be used instead of split chains (the current state of affairs) but it will be quite messy to setup tens/hundreds of different coins.