I for myself would like Segwit to be activated, as I consider the Transaction Malleability fix important. It is, however, true that there are alternative proposals like Flexible Transactions that would fix it as well.

Fixed transaction malleability would enable all the much-buzzed off-chain transaction methods (Lightning Network etc.) and atomic cross-chain trading (trustless currency exchange between different blockchains, e.g. BTC to LTC). However, as already said, I consider it important to be able to do on-chain transactions if needed and for that to happen a block size increase is also "a must" when the ~1.7 MB offered by Segwit are full.