in my mind you are looking for two separate rods.
the 6'9" st. croix premiere will handle the heavy glide baits and other jerkbaits but it would be my last choice for trolling. too stiff.
i think you would like it. i'm 6' and i wish it were a couple of inches longer but with the same rod action. compared to the 7'2" which has slower action, I think you'll find the 6'9" makes working gliders and jerks easier - it has an extra fast action and the tip wont flex with each jerk or pull.
for trolling, i prefer a longer, slightly softer rod to absorb the shock of strikes and bottom contact. if you have a dipsey rod it will work very well as a muskie trolling rod provided you don't go too crazy with lures, but for stuff like believers and jakes it works well. i trolled with a 9' MH dipsey rod quite a bit before buying a muskie troller. dipsey rods are cheap, and being glass, very durable although heavy (who cares, it is sitting in a rod holder). i personally use the 8' st. croix premiere glass composite muskie trolling rod and it trolls everything from little SSRs to 14"+ big lipped thumpers. great rod but not cheap.