I think you are definitely finding the weak spots.
Overall RDF is meant for Multiplayer, with the Solo as a "bonus". My main goal with the Solo is to get those excellent Myth II Mapmakers out there (either veterans or n00bs) to start thinking about making custom Solo conversions like
Banor's Keep and
Return to White Falls.
These play
much better due to the fact that you can set up the enemy units strategically to make the game more challenging. Anyone who is interested in doing this, just register in the RDF Forums here and start posting under the new "Building RDF Solo/Co-op Maps" topic.
The standard levels' conversion is mainly a fun diversion from the core of RDF, which is the Multiplayer.
That said, I saw that Deceiver bug at the very end of my testing for 5.0 and was too tired to try and fix it. There is something odd about the scripting that means it would take a lot of work to fix that tiny quirk, so it remained. Actually when I tested it I busted up laughing because it was so funny to watch the RD awaken the Deceiver and then blow himself up!!
And with the Trow I am remembering waaaaay back - I believe there was an oddity in the Myth II standard solos in that they didn't use the Trow "unit" in the most logical way between the several levels where they are enemies and then allies. Because of this I left the Trow alone and you probably can just blow them away right at the start. My only suggestion there for the moment is to just let them go out into the field first.
Thanks especially for your separate feedback on
Return to White Falls and the tiny bug where the Cannon Guards leave their posts to attack you. I made the Evil T-Ghols much more aggressive at the end of the 4.x series and forgot this would affect the play on RTWF. I will post an update when I get a chance and list something on the RDF Forums here when it is posted under "News". I'm thinking perhaps I need to do a blog site or something for RDF - *something*....