I don’t have any morphix puzzles except a pyramorphix (2x2), but you can fix a twisted “tip” by holding it at the back and doing a really easy alg: R L’ R’ L. You’ll have to do it either 2 or 4 times, depending on which way it’s twisted.
I like positions like this, they can be pretty interesting and sometimes extremely difficult. Here's another example that I found for someone a few years ago:
and probably my favourite one, on 4x4 (but you're only allowed to do Rw and U moves):
There is the small triangular corners as well.
use beginners method to turn the corners.Sexy moves to turn lower right front. Turn D to get a small triangular corner there. Try the 2 otherorientations. If that does not work, try the other small triangle. Small triangles can have 3 positions each.