I think the answer is... it depends, sorry!
'Imminent gentrification' is not a phrase I would apply to Motherwell, but it's like a lot of places - a mix of old sandstone and new 'luxury' homes, and lot of new built estates, and a lot of solid built ex-council homes which might be in a great area, or not. As for Cleland, well, not the hub of the universe, small, few facilities and and not a quaint little country village.
As others have said, it really depends on what you want from your move, OP. Schools? Social life? Wee corner shop for a pint of milk at 10 o'clock at night? Easy access to the big city?
Given the last few decades of housing booms and stagnation, I wouldn't be making investment my main reason for a move.
Are you an expat? Or can you afford to do a short visit to see the areas you are interested in?