Yes! There was a lot of press about it at the time - Hayden was super excited to be in the suite, and folks on the set on the day that was shot all talked about how cool and imposing Hayden looked when he walked onto the set as Vader
The other notable thing about that scene is Wayne Pygram in a blink-and-you-miss-it turn as a younger Tarkin. I think they should have hired him for Rogue One.
The question was: is Hayden in the Vader suit in the episodes that feature Vader?
Perhaps, But there are few things more disappointing than when actual Darth Vader shows up at a planet in his personal star destroyer, orders "start the attack", and then two teeny little transport ships fly out.
This seems to be failing across the franchise. I just chalk it up to the heavy fantasy nature of the franchise and assume there is some odd in-universe reason, like the existence of the Force caused people to not develop those skills for some yadda-yadda... reasons.
I always hate it when you hear that really toxic element of the internet referred to as "fans". People who hate something are not fans of that thing!
