I don't think like that.
The coin/token Price depends on the market, it's not because the exchanger. Cause Exchanger only provide the buyer and seller the platform so they can switch their coin.
It's just the same and happened to all coin and all exchanger.
Example : when some coin/token have an info and will got listed in Binance, the coin/token price will going up and what happened after 2 or 3 days after listed, their coin will go down a lot.
so it's just the same when the coin/token listed in which exchanger, they will always follow that stage.
first it's hype and then it will down. Then talk about the price, it depends the market, not the exchanger.
and Kucoin is a good exchanger in my opinion, never have a problem using them right now and their support is good too, sometimes they will give some reward to their customer by retweeting their twitter and for their top trading or the others problem.
But it's just my little opinion, you can research it too is it right or wrong