not 100% clear on your plan but the core team has refused to increase block size for years.
They only want to scale according to their own roadmap, no matter how good your plan is.
They are decidedly against on chain scaling by design. That's why BU became necessary.
But doesnt segwit also increase the transaction throughput? If it doubles the size of the transaction count, why not use that as a solution for now and then increase the block size later? Safety and security is more important than a good upgrade.