The fact that the equipment is aging need not necessarily explain the problem. The facility in which the Oilers reside could itself not be removing enough heat from the building. Could in fact be an HVAC issue.
That said, the problem exists so either
1) upgrade the HVAC system, or
2) increase refrigerant flow under the ice (buy another compressor), or
3) both
Judging by the fact that our ice was great before and isn't now, I doubt that it's the equipment that's to blame.
Frankly, if it is the refrigeration equipment at fault, then someone has been asleep at the wheel and something needs to happen. If it's an HVAC issue, that's a little more tricky as there may be a structural limitation to what can be placed onto the Rexall roof. Maybe the capacity can be increased.
Who actually owns the building and is responsible for it's maintenance? Northlands?