Agree with ya on several points, but I'm fascinated on the I1 & I2 comment. First, had to get off the floor when I read even a "Hint" of acceptance for the I2... still checking pulse if current life time.
But on the I1 being a toad and the I2 being a performer. Maybe a I1v1, but a I1v2 is normally very spirited and good performer. Newer performing motors, stiffer carbon frame, upgraded ESCs.
Then on the other side, the I2 used to be extremely performance, more aggressive, faster acceleration... overall a great top performer for cinema action usage. After several Firmware upgrades the performance was substantially lowered, acceleration is much reduced... to the point that many Cinema - Racing / Action scenes are not using the I2 as much. ** Edited ** Still has top speed, just less acceleration.
The I1 isn't a I2 competitor in many facets, but is used in several areas for it's lack of hi-tech electronics and more raw performance. It was made prior to the H920 so it is an aging platform but highly used in IR and several facets where low hi-tech is desired... a "plain Jane" Datsun 240Z compared to a Nissan Z.
Having flown & owned them all as well, and an owner that has personally felt the I2 performance changes with FW. I find the I1 still an agile performer... but both of mine are I1v2 Raw & Pro with Xoar Carbon props and I don't recall the I1v1 behavior... but it was significantly less.
Also agree with RPR, the X7 is cinema speciality, the X5S on I2 or X5Raw on I1 will probably provide better photography and better stills for terrain mapping... the X4S being the best of them for terrain mapping.