I fail to see how 500 special forces units are going to somehow tip the scale alone.
Well, if 500 would not be enough, they would wait for more until they do have enough, and just do other special forces duties (aid defense, hop into transports to try to raid, something) until they do get enough.
If it takes 3000 ships to have enough FP to flood my world, and generating 3000 ships is trivially done by murdering three systems, then what power do a handful of special forces guard posts have? They aren't going to build up 3000 ships collectively even ONCE over the course of a 16 hour game.
And if we boost their reinforcement numbers so that they do, so what? It just turns into a cross planet attack and I don't even notice that they did anything.
I'm not really sure much can be done for offensive variety.
We basically have for options:
-head towards the planet normally (possibly or possibly not waiting for enough firepower, and possibly or possibly not waiting for most if not all the group to arrive)
-package the ships up (if SF still uses "on the field" ships) in a wave and "teleport" them into a wave eligible system, possibly spawning them at the wormhole or spawning them at the border of the planet
-package the ships up (if SF still uses "on the field" ships) in a wave and "teleport" them into any non-warp jammed system (sort of like counter-attack waves), possibly spawning them at the wormhole or spawning them at the border of the planet
-introduce new raiding behavior (like packaging them in transports or cloaker starships or something funny like that), which is basically a fancier form of the first option
-"recycle" them and use the exo-points they are worth to make a new "mini-exo wave" that could use one of the above behaviors, but again, that is one of the other behaviors with different ships
So yea, I can't really see any way to add novel offensive variety. The idea to allow the special forces waves to be sent to any non-jammed planet like counter-attack waves can is intriguing, but may be a bit too disruptive/intrusive/annoying for some people's tastes.
EDIT: Though I can see something really crazy, like basically scrapping the current special forces all together, add some new crazy building type management thing like the hybrids have or something, and then call that special forces. That would be "special forces in name only" level change, which I didn't think was what this poll was all about.
In case you haven't noticed, I am more interested in adding new defensive variety for the AI, which is sorely lacking at the moment, which is why many of my suggestions don't really do much for offensive behavior. Not saying that I would object to new offensive behaviors of special forces, but that is not what I am focusing on at the moment.