To tell the truth, I was pretty preoccupied with how close they did make the ds version of LSWCS to the console versions. I mean sure there were cuttings/alterations to the game, but it's very rarely that we see a handheld version of a console game get so close to the bigger brothers.
When a game goes portable, the devs usually just scrap the console game completely and just build a different game (like Crash of the Titans on the DS which WAS very good.....maybe better than the console versions, but a totally different game from the console). They did this to LSW Original Trilogy (which was horrendous), but in the Complete Saga DS was a game that stayed pretty true to the console versions' original levels. The fact that the game is portable is great. In all it's cut down aspects, it's still a meaty game with a lot of replay value.
I do think they could have retained the cut level in each episode easily with a 128MB cartridge instead of their 64MB one. They could have included the FMV of the console games (like they are now correcting with Lego Indiana Jones DS). At least they used the real soundtrack of the movies instead of the MIDI of Original Trilogy.