Some morning brain farts:
It would be simple to do a custom LE image aimed at e.g. Tvheadend with more built-in/pre-configured. However the main challenge with DVB is that half the cards users show up with require a non-standard kernel hacked to run with a not-upstream driver so the more appliance-like you make a DVB image, the more limited the audience of users it might work-for becomes. The secondary issue is the inherent diversity of a global audience. LE active-install stats show we have more German (#1), Czech (#3), Spanish (#4) and French (#5) installs than English-speaking US/UK/CA/AU countries combined (#2/#6/#8/#9) so one design danger is assuming the audience and config requirements we see from (English-speaking) forums looks like the one we're most familiar with.
The add-on from edit4ever might be a good base to work from: https://github.com/edit4ever/script.module.tvh2kodi - the last update was a couple of years ago and Jason hasn't been active around here for a while so it probably needs some work. With my LE hat on: It would be great to have it combined with a setup wizard in our repo to make it more accessible. With my Tvheadend hat on: I don't believe the add-on depends on LE so updating and publishing to the Kodi add-on repo or perhaps to an independent repo that Tvheadend manages would increase the potential audience; albeit at the expense of integration with the LE settings add-on. NB: Tight integration creates the best user experience but typically increases maintenance and if you sense any hesitancy among project maintainers towards integrations; it's because we have an underlying desire to keep things as simple and low-maintenance and sustainable as possible. With that in mind, I suspect a series of good HOWTO guides for the main PVR back-ends in the LE wiki would be a good start for our users.