they will never do anything to limit the offensive capacity of the horde 
most people that play AH care only about 'winning the war', and would say that winning by overwhelming your opponents with numerical superiority is both a perfectly valid and a perfectly realistic tactic
Fugitive you always talk about the number of customers that HTC would lose if the game was made to look better and therefore required a better computer to run - do you not think that HTC would lose just as many, if not more, if they suddenly made it much more difficult/impossible for the hundreds of really bad players to achieve anything by taking away the offensive capacity of the horde? ;o
I don't always talk about losing people to better graphics, I am just repeating what has been said and what would be logically true. HTC does a great job at making it so a wide variety of computers can run the game. If they didn't how many "laptops" do you think would just up and leave? Players can adapt, even when they have no extra money to spend. Making it harder isn't going to stop them, but it will force them into looking for other ways to do the same thing.
No, I meant players as in the defenders. Any way you can think of to give them a chance at stopping the horde, or at least slowing it down?
It's not worth their wile to defend in most cases. NOE's are spotted just in time to either up there and get vulched a bunch until all the hangers are down, or to up for the next field over to only get there just in time for their ACK to open up on you as you spot the goon that you now realize has already dropped.
If a mission comes in with alt... rare, but it does happen

You can try to up and get high enough to defend, but your never going to get the numbers together quick enough. So you end up at a reasonable alt with 5-10 vs 1 depending on the size of the force hitting you. You get that one attack period, because even should you kill 5 and run like a little girl to land your kills the base is captured long before you can get back.
How to make it worth wile to defend? I don't know whats "possible", but use what people are after now. Name in lights, perks. Say the Bish are stopped from taking bases from the Rooks for an hour. Arena message "SYSTEM MESSAGE: Rooks hold off thieving Bishops!! Perk Points Awarded!" and give everyone on the rooks 10 perks. Acknowledgement and perks, just like winning the war. Not as many, but do it 4 hours running and you get the same as winning the war. Maybe hold both front for an hour you get 20.
Your never going to be able to get it down to "individual" awards because I don't think it would be easy to track that "So-and-so" defend A22 against an attack and is awarded X amount of perks. It would be nice, but getting a team award seems to work for the "attack" side of things, maybe it could work on the defense side of things too.