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.
there wasn't a proposal for a 2MB increase from core in 2017 alongside with the segwit implementation, i remember this roadmap for core, are they changed their mind?
i remember that they said in the case segwit would not be activated in 1 year, they were going to increase the block to at least 2mb