The only issues I could see arising are the M8 can be dreadful now with how many cars there are and getting in and out of Braehead with the amount of traffic lights can be painful if you don't time them correctly. If they give it enough recovery time and balance out the journey time it should be okay.
Whenever I have been in Braehead and seen one they've hardly ever been that late in either direction.
On Fridays I rely upon the 1806 departure ex-Kilmacolm which is always a bit hectic having come from Glasgow
-Sometimes the 1752 shows up (going the slow way via Slaemuir) at 1806
-Sometimes the 1806 doesn't turn up until 1821
-Sometimes the 1806 runs on time and yet goes around the back of Slaemuir anyway behind the 1752
-Sometimes the 1821 is the first to arrive of the 3
-Sometimes have to figure out which bus goes through Slaemuir and which one doesn't
-Often however it can work fine
Can you see the problem?