Vader's invasion troops come down in shuttles, they can land near the base when the shields are down, that is why I think bringing in TIE Fighters and Bombers would be a logic addition, because they are the escort for the landing troops - not wanting to be shot down by X-Wings or Speeders ;-)
Yeah, some more troop ground battle would have been nice, maybe "Rogue One" will give some footage, which can be tweaked to fit the "Battle of Hoth"