I don't think you were that wrong, mostly just some typos and errors. I support multiple of the options, ideally Siege defence with Centurions, limited air and some kind of stubborn rule for me.
Centurions don't have to be added, but it would be appropriate as they use them a lot in 40k. It would make the list more different and give players an Epic list to use Centurions in if they particularly like them for some reason. Your call as list champ on these though.
You really should follow 40k and existing precedents to some extent though e.g. using the existing epic Assault Terminator stats and not inventing a new version with Heavy Flamers when 40k Assault Terminators can have no ranged weapons.
Quote:
I've not actually read the codex yet, it's on my 'To do' list, and frankly I'm not excited about it from what I hear...
While hardly high literature the background and portrayal of the Fists is actually not that bad, you should give it a quick read over at some point.
Quote:
the modern imperial fists list would include centurions, thunder hammer terminators (possibly alongside regular terminators), special pop-up fortifications which are destroyable, thunderhawks, siege dreadnoughts, and spacecraft
Centurions and Assault Terminators are perhaps the most significant additions by reading the Imperial Fists codex, stuff like the siege dreadnought isn't mentioned in it, but it's an existing FW unit and if it fits anywhere it's in a siege list. Fortifications in a defensive siege list would be logical, making them the drop fortress or destroyable are just possible suggestions people have made.
Quote:
I don't know at all what's contained in that. I'd wager that many people on the boards would be in the same place too, having left modern 40k silliness behind, long ago.
It's been many years since I quit playing 40k for good, but I still keep tabs on the newer stuff and like to use it to inspire and broadly guide epic development. Most of us are older players but it would be good to find a balance between new and old, leaving out and avoiding bits we choose, but keeping aware and adopting the good bits.
Incidentally modern codexes and the like are easy to find online to have a read over, you don't have to pay for it.