Sadly, I must inform all of you that those are three of the worst DT songs. But fear not, because if you liked their not-so-good music, you're going to love their great music. 
Sadly, I must inform you that unfortunately DT released an entire album of music much, much worse than any of those excellent songs. It is called When Dream and Day Unite.
If you factor in production yes, but TKH and Afterlife, at least, top those songs for me when it comes to the actual songwriting, as borne out by the excellent live performances with JLB. A Fortune In Lies would be in the discussion as well.
I'm not even factoring in production, I'm just factoring in the amateurish songwriting, and very poor melodies and phrasing. Even with their minor faults, TDEN, CM and AROP are very well constructed songs, and there's not even a comparison in how far ahead the songwriting is for them imo.
The WDADU album as a whole has plenty of amateur moments, and I love SC (my #3 DT album) and BCSL (5 or 6) but I disagree. I think AROP's and TDEN's instrumental sections, in particular, are quite jarring and add nothing and/or detract from the songs. TKH, on the other hand (if you use, say, the Marquee version), might have the most effortless flow of any of DT's "intricate" compositions, with disparate verses and riffs melding together seamlessly. Afterlife also is very well-constructed.
Constant Motion is pretty well-done, though I don't see any obvious reason to think it's better-written than, say, AFIL. The biggest weakness with those songs' original versions is that they were written for the wrong singer, which is immature, but with LaBrie they come together quite well.
I will say that AROP and TDEN are certainly ahead of LFAGA, TOWHTSTS, and OAMOT in terms of maturity. I get where you're coming from. I just don't think WDADU can all be put into that same pot--it's not a uniformly immature album; instead, like many first albums, it shows flashes of maturity of brilliance but does waver in spots.