Well I'm not sure about upgrading original metroidican and Morgul returns, both have been upgraded already and I'm not convinced they need more work, indeed I'm happy with all of Lukasz levelpacks as is.
I've now finished metroidican mission x and I distinctly liked.
I especially appreciated the fact that the Metroid riped graphics were not always obvious. There were some places where they were (like the power stage), but not all, though i did notice several very clever references back to Metroid Ii, like th nest corridors in the torn jungle.
in general a lovely looking pack all around with a vibrant and bright atmosphere.
Gameplay was mostly evened out as well, without any of the major unfareness, though those wind jumps in the shaft level got me cursing .
I particularly loved the return of the Nightmare, (with actually better music than in Metroid fusion i thought), that was especially cool, and flying in the ship at the beginning battling dragons in space was a great addition, albeit the asteroid belt from Turricane 3.5 is still my absolute favourite flying stage yet.
my only real cryticism is with the music. Not that Peter didn't do a good job, but that the over all feeling was a little too modern, pop and trance for the feeling of many levels. This isn't true everywhere, the first level and power room had great music, but it did effect some parts such as the alien vault, and I didn't really appreciate hearing "here we go" and other samples.
It's always been the melody and cord structure that had as much involved with the Turrican soundtracks as the synth instrumentation, and it was those areas felt a little lacking.
In fairness Peter isn't the only composer for T2002 levels to have done this, but I did feel it was a little out on such a classic themed pack as a tie in with Metroid.
Of course, this is personal opinion, and I admit for music I am rather particular, indeed it's sort of an interesting fact that next year I'll be studdying voice full time, and that! is partly due to Turrican's inspiration.
it is also not fair to say all! music was like this, I particularly liked the first level theme, underground theme and ending theme, indeed the ending felt great.
All in all an outstanding job, colourful, vibrant and great fun. It's quite amazing really that even though T2002 is over 10 years old, people are still! finding new ways to use the game elements to create new places for Turrican to explore.