Well you know what I'll say first so I'll skip that part and get right into what I'd add/cut
First you need to decide if you want to go the Thalia route or not, meaning if you want to use creatures that have ETB effects/death effects and not use non-creature spells, I always try to go this route cause I like to mess with people it probably won't work as well with Golgari becoming so popular but you never know.
If you want to go the other route you should cut Seller of Songbirds and sideboard Loxodon Smiter, I don't really understand the inclusion in maindeck in the first place, it doesn't really fit in well, but it's beautiful in any sideboard. Then cut the Call of the Conclave, In my opinion a 2/2 Vigilant knight is better and having options makes it better for sure in my opinion.
Finally, I'd add black for some really cool stuff, especially Lingering Souls, and Sorin, Lord of Innistrad and with the shocklands being back tri-color is actually plausible, however since everyone and their mother is clamoring to use golgari it's probably not worth the investment for the mana base oh well what's a person to do?
Am I the only one who thinks Trostani, Selesnya's Voice is kinda crappy? I'd much rather pay 1 extra mana to be able to populate more than once per turn, maybe this is from too much of an EDH point of view but I'd happily pay 1 extra not to tap and his other ability is cool but doesn't seem game-breaking in constructed by any means.