At the moment segwit doesn't help litecoin at all.
This is nonsense. Segwit wasn't designed as a capacity increase. The capacity increase is a side-effect of it. List of benefits:
Malleability Fixes
Linear scaling of sighash operations
Signing of input values
Increased security for multisig via pay-to-script-hash (P2SH)
Script versioning
Reducing UTXO growth
Efficiency gains when not verifying signatures
Source:
https://bitcoincore.org/en/2016/01/26/segwit-benefits/