If Jamawani routed you then there's probably not much to add.

I second the Icefields Parkway, it is indeed spectacular, although I realize it would require a major revision of your plan. Moraine Lake is worth the detour. Mt. Robson is just N of Jasper, somehow I missed it.

I noticed your route skipped Waterton, You might make a stop there, very nice lake view south into Glacier NP, and a visit to Prince of Wales lodge will make you think the guys who ran the Great Northern Railway were either geniuses or nuts.

If you like hiking, Glacier NP is a great place to stay for several days, especially the Many Glacier area. Lots of trails leave MG in 3 directions, MG Hotel is something to see, and Swiftcurrent lodge is the cheapest one in the park, if you can get in. MG has a campground, store and cheap (for NPs) restaurant, laundry and pay showers. MG is off by itself so lots of tourists never make it down to the end of that dead-end road.

The entire North Fork section of GNP is quiet and uncrowded, a dirt road travels all the way to the border. The four lakes accessed from here are really worth seeing. I spent an afternoon at Bowman lake completely alone during peak season. Polebridge Merc offers groceries/bakery/supplies, so you're not really out in the wilderness.

I'd have a hard time bike touring your route, since I'd rather just stay in GNP and hike.