I hate to say it, but this work isn't helping anyone.
The reality is, is that having yet another XP source is useless.
There ALREADY are too many ways to level. What AO needs is ways to GET STUFF WHILE LEVELING.
If the SL missions reward players with useful gear, THEN it's worth while. but if not, then it's just yet another route to get from level A to level B which FURTHER dilutes the team pool.