Well, that's not true. My homeworld just died right now and the shard was not even at the first wormhole. This was the second shard, ie the one you need to make your first spire colony.
Also last night the game I was running, the third shard was destroyed (I think, I had to leave it to get my ships back to save my home planet) and there was no respawn of as shard, so losing a shard seems to end the campaign. That caused me to restart.
Some comments from someone very new to AI War (I actually played it early last year around the time of the zenith retirement but got sidetracked) and from someone pretty crap (I could not kill the AI in the tutorial when i restarted last week! I scouted the AI homeworld with transports (LOL) and got flattened by the counterattack, and it started reinforcing like mad after...
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First, once i got my city i had not done any turret research (gee i wonder why i kept losing my colonies) and there was no indication that the spire guns were tied to turret research. It said I had to research better gun and shield tech and I was at a loss as to where to do it. I didn't realize it till I snuck a look at the walkthrough.
Second don't take out the first shard mission. Its not bad at all and the building you get at least gives you some resources once you build it, which you need and is a decent reward for doing it. And it does at least warn you that the AI comes after you hot and heavy once you get a shard, though maybe not to the extent that it does.
Third it takes too bloody long to build the spire buildings. Cutting that in half would help the grind aspect immensely.
Fourth it does take a long while to bring the shards home, and defending the shard and running home defensefor such an extended period is beyond my present capabilities. The game last night I got it the first home simply because I actually had a Hive Golem escorting it, but in the second one I had the Golem at home running home defence against the AI raids. With the second mission, where you find the refugees, I simply dropped the ship in a transport and ran for it. No problem,, enjoyable slightly different to the first one.
I think the real problem is that the shard missions are too samey. You get a location, you go there and you have to run a gauntlet again and again and Again and AGAIN. The definition of grind really is doing the same thing over and over and over again. You don't need to have less shards really, what you need is variety. For instance, how about a mission if you had to build a level 3 science station at a specified system and defend that while it ran a scan of the system, and once complete a shard would pop out a warp gate you built at your homeworld? Thats a different kind of mission that accomplishes the same thing as the long slow fightback to your home planet AGAIN) (plus you would get the knowlage the science station harvests as an extra reward). What about a human colony calls for help, and when you rescue them they give you a shard as a reward? (and maybe you have to get it back to your homeworld to use it, which at least gives you a safe starting point) Why not find another refugee ship again instead of one of the shards? That would break up the monotony
I mean, in many ways every planet in the game is the same thing fight over and over, but every planet is actually different. The small differences actually make the game interesting. Thats the key to making this campaign work. and then there is the whole AI war philossphy of forcing hard choices on the player. There might be some way of forcing a change.
As for the OMGFTWBBQ of the spire ships making the game less interesting, it would make sense that the AI would beef up its homeworlds once it realizes you are fielding spire ships. I don't see it doing that as a problem per sai.
I hope these thoughts help you guys out. I think with a little tweaking, not very much, the campaign could be really steller. You don't even have to reduce the number of cities to do it, just vary the experience a little.
What a first post..