0.64% MER is much higher than what you can get with Vanguard. Mutual funds are about 4x less expensive, some ETFs are 10x less expensive.
The lowest bank mutual fund in Canada that I've seen in from Tangerine at ~1% MER, are there ones lower?
Without having to handle rebalancing yourself? AFAIK then Wealthsimple and Tangerine are already the lowest you'll find without working with ETFs or index funds directly.