Dear @tech@zwo#52908 just to make sure, we are on the same page: a rotator is a motorized device with the purpose to rotate the image train - thus the sensor - to a desired degree with respect to the mount. It does not interfere with any device in the image train - neither the EAF, nor the EFW or the camera. (In the picture you posted above, the PegasusAstro Falcon Rotator is the slim blue device right next to the their EAF.)
When setting up the mount, this is usually done manually in combination with plate solving from the ASIAir to perfectly frame the target. As Improve101 mentioned, doing this manually can throw off your polar alignment, why many people prefer using a rotator (and will prefer N.I.N.A or other software solutions over ASIAir). The need for a rotator drastically increased with your adaption of a plan mode. Usually, every subsequent target needs a different framing compared to the first target. The plan mode only centers on the target - but does not correct the rotation of the sensor, which often leads to poor framing of the need for a mosaic to cover subsequent targets. In both cases, time and effort is wasted.
Of course, it is ZWO's own decision to support 3rd party INDI / ASCOM devices - but having a rotator as an option is just essential. Every other astro-software supports these kind of devices! Therefore, the choice is either to bring a rotator to the market soon, or open up ASIAir to 3rd party rotators. You are very competitive in quality and price. There should be no need to fear competition when opening up ASIAir for 3rd-party devices. It will just lead to a better product.
Please consider either developing your own rotator soon or supporting 3rd party rotators. If you need someone for beta-testing it, you can count on me.
