I agree that there are too much trade restrictions. Trade posting limits at 3 is understandable as higher volume might result in game lag etc. But buying limits should be higher.
As said by Alkorin, sometimes we find a good deal, but am unable to take it due to the items needed would takes all our trade counter away or we just does not have enough tickets.
Max of only 6 tickets a day is too little. Due to time zone and unable to join some battle. I only get about 4 tickets a day. Which i can't even use to buy a 1SR a day! Which means to trade for a MR i have to store ticket for 2-3days. WHICH, by when i have enough trade tickets, the item might be gone because the posting time limit is only 2days!
If the trade limit per day has to stay. At least Remove the trade ticket.
If the trade ticket has to stay. At least make the ticket gift/trade able to purchase with crystal.
Additional things like improvement in search function, able to view skill level of items on trade. These add ons would be awesome.
As far as i feel, what makes a player plays is the gameplay/graphic.
What makes a player stays, Good Trading System sure does a big part.