I don't think spam is meaningfully increasing the utxo set size - especially now that there are no new suckers for the brc token scam. That's different to big blocks where the utxo set would grow fast or even unchecked.

I'm no expert, and there are nuances, but I will say that I believe the block size increase with segwit may have been a mistake.

If I thought node cost and/or utxo set growth rate was a problem, I'd push for a blocksize reduction. I think there are quite a few devs who would support it. Far more than filters, where Luke is basically by himself.