I remember Willie Rushton's narration of "Gallant Old Engine" on audio cassette tape when I was a child. Seeing this televised adaptation makes it all the worthwhile. :)
I always found it strange with the episode "Four Little Engines" as it simply "Skarloey Remembers" and "Old Faithful" put together. Hearing Michael Angelis' narration of "Old Faithful" makes the ending much better.
Well don't forget they merged a number of Railway Series stories into one episode like "Edward's Day Out" and "Edward & Gordon" along with "Gordon's Whistle" and "Henry's Sneeze".
Seeing Tommy get into the cockpit of Dragonzord for this fight was quite epic and it would make sense for a battle such as this. It was also neat to see him in the cockpit with the rest of the Rangers when Ultrazord was formed. It didn't make sense how in The Green Candle Part 2, he got into the Dragonzord's cockpit, but when Ultrazord was formed, his disappeared.
I agree, I feel in retrospect that Doomsday should've been left until the season finale because then Rita would've had her final battle before Zedd came to takeover in season 2's beginning and just the way the second part ended just felt like an endgame.