FFP is more about debt and cash flow that strict expenditure cap. Afaik FFP already exists in T11. T11's FFP allows debt only within a fixed time period and if not settled assets are sold.

F2p and p2p co-exist across the game world and f2p can be competitive when its accompanied by time/farming.

For f2p and p2p you must find your level and play to it. There should be caps on spending but those should be personal ones - folks that overspend either quit or remain unsatisfied.

I vote No.