For all AX-series routers
It would be nice if you provided the option to enable SSH for advanced users. most of the packages that people need are in compiled form in the "freeware" archives and nothing else is needed to install them (you already use some that packages), or they are already embedded in the router and you just need to enable it. This would greatly expand the functionality of the router.

The ideal option(that's can be realise without ssh for all users), of course, would be to create your own package repository for routers, which would allow everyone to customize routers to suit their needs. This move would increase the demand for the product and the respect for the company among the people who know it.