Agreed and, if you are going to add extra level of detail to the invasion interface, pausable real time isn't the best method, but some form of turn based.
I think that having some more detail would be fine, as having some extra options, but it still needs to be mostly hands off for the player given that there might be other points of interest to oversee.
I'd love some more orbital impact on battle (ortillery at the very least)
I woulnd't be opposed for planetary invasions to take longer, though, could help with the idea of more limited wars, and making wars more expensive.
So most of the time you'd trade a couple of border worlds or the like, but an invasion against a regional capital or a core world would and should be a daunting proposition and give the bombardment options some extra value (either to soften up the planet for invasion or to just remove the planet from play, thought the latter would be very much a total war option)
I would like to see normal weapons having some incidence on bombardment (as ortillery) dedicated weapons should be an order of magnitude more efficient, obviously, but most missiles should have some effect (and same for some other weapons, like railguns and maybe some energy options as well)