Mostly enjoying this so far. It reminds me a lot of Code Geass but swap in OP pilot MC for Lelouch's planning. Perhaps there will end up being a driving force for why things are moving the way they are, but the plot overall seems pretty arbitrary with most groups simply fighting for their own self-interest.
The isekai part of it is also a curious twist with not only other classmates but other earthlings popping up all over the place, and putting more emphasis on the mercenary aspect to the fighters. When the enemy dies, it might just be a former friend, or at least it's likely not actually someone related to the people who are dictating the war.
ETA: I don't know I missed them putting the power levels into context or if it's just something that's meant to feel vague and arbitrary. It seems like anything below 10k is trash (unless plot makes an exception) while most decent fighters are between 30-50k. I might be misunderstanding it, but the author keeps listing a 'max' limit for each machine that go into values much, much larger, but it doesn't seem like anyone is capable of actually measuring those values nevermind managing them with their current economy and militaries. I won't speculate on the mystery of '2' but clearly the MC is operating in a different league from 99% of the world's people.