I'll be honest, if I were a normal user, then I would be happy with that.
YES, having some way to get that info is potentially dubious... But if it's a proper, encrypted/authenticated connection - which it should be as it's their hardware and their firmware, that only provides that info, then it's no worse than any http server having a status page showing what server SW version is being run.
The advantage of this is that, if they are doing it right, your router can be automatically "administrated" from TT, or whatever ISP it is, by which I mean - they can monitor the connection health to identify network problems faster, and they can push updated firmware to the router.
This means that any network issues can (hopefully) be addressed faster and any security updates pushed out. The User then doesn't have to worry about updating the firmware themselves (be honest, how many "normal" people do you think will check for firmware updates and install them?)