I have 2 things on this...
1, I'm in a guild, 235gp, and we're pushing 30* in DS TB, that's in 6 months of its release, so imagine how close the top guilds are?
Releasing the LS TB at the same strength, by this summer, most top guilds would have both Geo TB on auto.
I have no issue with how tough it is, it can be done, however, it does bring me to point No2...
I think they've messed up where the platoons give bonuses.
None for Phase 1 and a platoon in Phase 4 that effects Phase 3?
As most have said, it looks like P1 is the hardest and platoons make it easier as you go.
Evidence from my Guild is some can't complete a wave in P1 but the same team is maxing combats in P2 or 3.
That's a genuine issue.
Phase 1 should not be the hardest.