The arguments against ossification are almost entirely around new stuff that devs want to build. 

If that's the priority, why don't you build it on Liquid or Lightning or some other place that's not the base layer? Liquid in particular has a very similar system as L1 and on testnet, they have Simplicity enabled, which should get you pretty much any primitive you want that's not Turing complete. If your idea is so great, why don't you show the benefits of your idea by building elsewhere? Your argument for why you want a soft fork would be a lot better received if you showed evidence that the thing you want to build actually has a robust market.

If the reason why you won't build on another layer is that it's too cumbersome or difficult, then I have zero sympathy for your plight.