It is as if they tried to make the new effects "more exciting" by adding useless motions to the ships..
Blame it on people brainwashed by ILM/Star Wars
, instead of taking influence from the actual TOS FX/ship movements. The most logical way of "upgading" TOS FX would have been to think like FX artists of ther period if they had the larger budget--which would have been the ship work (lighting, detail, movement) seen in 2001,
not the Lucas-ized, video-game crap of TOS-R.