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sounds like this concept is already closed, if the client is using it already...but anyways:
i think it looks great, and can stand as is....however, if I were to tweak it, i'd experiment with different colors for transport. maybe simply using the lighter shade of blue found at the top of the bird...
i don't like how the R and T interact in transport either. there's a little air around the O, which could allow you to nudge the R to the left. Or you could nudge the T to the right..
A couple things I'd test out, just to see if maybe they looked better, would be extending the P's leg down so that it lined up with the bottom of transport; and I'd make the top corners of the P in SPM square instead of rounded.

Surely valuable comments, I will try to implement the same. Thanks for your time