You could release it as... well sort of "Open Source". I think ArmAholic would be glad to host it for ya. That way people who are intrested can have a look in it and if they want, they could develope it further.
No reason for your work to go to waste really. That goes for other content that's in the same state (i lost a few models myself due to a HDD failure last year).
If you don't have the time/mood to work on them and get them to A2 specs, you can always release those in MLOD format, maybe someone else will pick it up where you left it. Also, i would put a readme file with your credits if you decide to go down that path.
You could also contact granQ, i know he had a project about acquiring non-released and non-used content, so he/his group can finish those and release it back to the community.
Either way, just deleting it is, in my opinion, the worst thing you can do
Ignore Mac, don't let all your hard work go to waste. Release it as is, hell maybe somebody will even offer to continue your work.
Why should he ignore me? I'm offering an opinion that is quite popular. A lot of people play ArmA because it's NOT Battlefield. If Sled88 wants to make a BF mod go right ahead, it'd be interesting to see how much bigger the kiddie horde will become. BTW If the quality of this is anything on par with the Conspiracies mod then there might actually be some hope for it. Anyways I said what I wanted to and I wish Sled88 the best of luck.