There will be no more expansions or DLCs for this game. The devs announced this earlier this year on their website.
They recently released a patch, but it was probably the last one. If bugs are discovered they'll probably be fixed, but the game is pretty much done by this point. Further changes will be made by modders only. (Some big mods are in the works, but it remains to be seen whether those'll see the light of day. Meanwhile, there are plenty of smaller mods, which you'll have to liberate from the Steam Workshop, but that's easily done.)
Bethezer is quite right that you don't need the Deluxe edition. I'd strongly recommend getting the expansions, though, since they elevate the game from "good" to "great."
I can't, of course, predict whether you'll like it enough to buy. I can tell you the game is:
* Turn based strategy
* With excellent tactical combat (up to 42 units, lots and lots of abilities, spells, and variety, easy-to-learn-difficult-to-master. The battles are what keeps me playing this game, and it's the best turn-based battle system on this scale that I know.)
* But less deep empire building (It's a wargame. Think Total War rather than Civilisation. No science victories here)
* With commendably competent AI (much smarter than either Total War or Civilisation. Still not a match for humans, though new players often get kicked in the rear.)
* With a great leader creation tool, with tons of options (9 races, 7 classes, 23 specialisations of which you pick 3)
* And an excellent random map generator
* But mediocre campaigns in the base game
* Though the expansion campaigns are much better.
* And there are also plenty of custom scenario's, both provided with the game and downloadable from Steam Workshop.
* Lots of places to explore, lots of things to do, heroes and units to level, spells to cast, stuff to find, etc. Fear my Dire Penguin! "One more turn" syndrome very much alive and well.
* Options to play live multiplayer, play-by-email and hotseat games, though the first two options require you to log in to the developer's servers.
* Colourful (though not spectacular) graphics and fun fantasy landscapes to explore. (I particularly like the huge variety in battlefields you encounter)
* Good soundtrack, though I often use mods to swap in the soundtracks of the first 2 games.
* And a lot of polish. (Virtually all bugs have been ironed out, the devs provide great support, though they mostly hang out on the Steam forum.)
Post edited December 03, 2016 by Jason_the_Iguana