Do you know what is the current status of SegWit and when will it be released?
There's been a testnet for it for a while now. The planned release is April. To deploy a hard fork with consensus (95% or higher) it would most likely take the network more time than that (if we took that path).
If we already know that the solution is a block increase I don't understand why it should be an increase to 2mb. If the increase is to be to 2mb in 2 years or less the community will be facing the same problem again.
So, in this sense, the increase should be to at least 8mb or even more.
How about you don't suggest anything since it is obvious that you have no related knowledge?