1. The process of sending merit seems a bit annoying. You've to go through another web-page and select number of merit to be sent and then send it. IMO, it'd be better if it could be sent just by clicking "+Merit" button right within the thread.
I think this was already resolved.
2. It'd be much better if you guys allow only one merit by the merit-sender per post. This will reduce fake-merit-exchange or fake-merit-giving. There're people sending tens of their merits to a single post which clearly seems like something fishy.
I think limiting the merits given by a merit-sender should be limited, but not one merit only. I would agree with Jet Cash, I would say two is better. Posts may be classified in two- good post and great post. I think that would be enough to tell a post was indeed constructive, precise or straight to the point and indeed helpful and informative or just simply right and informative.