Standard-set votes are open to every tier (your vote counts more the higher your tier). Exclusive-set votes stay reserved to Olympian & Pantheon.
Your vote weight equals your rank. Standard-set votes (Tier 1) are open to every rank. Exclusive-set votes (Tier 3) stay reserved to Olympian and Pantheon, weighted the same way. See the Tiers page for how much content each rank gets per month.
Up to 2 suggestions a month. I read every one when planning future sets.