And the Decepticons were hardly in a "fragile" state. They were on top of the world for their defeat over the Autobots.
The Decepticons were in a fragile state because they defeated the Autobots. They lacked direction and purpose. The longer they were idle, the nastier they got towards each other. Skywarp and Bombshell got into a kerfuffle because wiping out a city was boring for them. If Megatron started bumping guys off, that would have made things worse for him.
McCarthy was certainly not writing above that level. Seriously, look at what the Decepticons were doing in this story. Attacking a relatively defenseless planet, with no real reason or purpose given behind the attack. This is not a rational strategy if there is nothing to be gained from it and shows the Decepticons were most certainly cast as homicidal maniacs by the actions and enjoyment they got out of it (for a time at least).
If your army consists of homicidal maniacs, it does make sense to give them things to kill. As you point out, it only works for so long. But, it is a better plan than nothing.
And, McCarthy used fewer McGuffins and "they is teh bad guyz" moments than the cartoon.
You seem to keep ignoring the fact Megatron himself says in AHM that he is trying to kill this incredibly ruthless army he built in order to remake them into the force he originally intended them to be. No infighting, no dissent, only "perfectly controlled peace through unparalleled strength".
I took "kill" to be more metaphorical. It would be more a question of re-educating the troops than of killing them, (which would require Megatron to replace the personel he killed). Megatron would be (a bit arrogantly), assuming his strength would keep them in line.
How are those situations different? They were both plotting to overthrow Megatron, rebelling against his authority as Decepticon leader. AHM is only different in that it wasn't just one 'bot Megatron needed to put back in place but the situation is essentially the same. Rebellion against his leadership. In those cases, Megatron brutally reminded them why he is leader, nearly killing Starscream and seemingly killing Ramjet. Why would this situation be any different?
The motivations for the rebellion. Ramjet was ambitious, (being written like a Furman character). Starscream was a bit less ambitious. (He reminded me of a corrupt goverment worker, just skimming off the top every so often.) The other Decepticons were rebelling out of boredom.
I don't really care about the Spike story at all, I'm just curious about the Bumblebee story.
I wager the Bumblebee story is going to read like "issue 0" of the upcoming BB series.
The buzz on the Spike story is not encouraging. But, given that some of the IDW comics I most dreaded, ("Spotlight:Kup" and "Arcee" come to mind), were some of my favorites.
That's pretty much how I'm looking at this issue as well. I'll look through it when it comes out but I doubt I'll get it. I'm just not particularly interested in the two characters for this final issue.
On the other hand, you have 15 issues out of 16....
And, like I said, the BB story is likely to tie-in with the miniseries.
Dom
-not too hyped about issue 16.