The trams, as they stand, are just not up to the job of getting large crowds to and from City's ground. If you use them off-peak, they are generally great. Peak times, be prepared to be packed like a sardine, but they will get you there. Massive football crowds are a bridge too far.
I am sorry, I still take the view that we need an actual railway station on that goods line round the back, and yes I know it will cost money. But if we are going to make our ground bigger and eventually have a host of other attractions around the estate, it is needed. Pissing about with tram schedules and so on is not going to do it. Because the trams are being asked to do a job they are not up to - the fact they share the road with ordinary traffic over part of the route doesn't help either. Again, if you are on it on a Wednesday afternoon, it's fine. Football nights - bloody hopeless.
The other thing that might solve it would be a bespoke solution like a monorail to and from town - but that would cost a mint and it's about as likely as the Isle of Man joining the space race.