Hi,
Not going to be worth it, if you are just considering it for APs/ Wired backhaul of the mesh devices because they are 1Gig ports, I've not yet seen any Mesh routers/APs that have 2.5G ports.
As for upgrading to 2.5Gig, yes definitely worth it, but only if you have other devices on your network that are also 2.5Gig and you need to transfer data between them on a regular basis e.g, backups or NAS or media server.