I'm with SL through work as well. I spent 6 months with a balanced mix of funds, using the Bond Index, US index, EAFE index, and did OK, but my Vanguards are doing much better due to lower fees.
You're lucky you also have a Canadian index- my plan only offered the higher cost funds that under performed miserably.
Personally, I'm amassing funds annually in SL through paycheck contributions and employer match. Then once a year, I pull the entire thing with no fee and move it to my self directed account and buy the Vanguard version at lower fees.
Your listed fees are quite a bit higher than my work plan- must be a factor of your companies volume, or lack thereof.