A Battle.net forum thread points to a reddit post from Srey, at the time the #1 rated North American Hero League player in Heroes of the Storm, who gives a thoughts on the game from his lofty perspective. These include some complaints, as the headline of his post is "Matchmaking is the biggest impediment to the growth of Heroes of the Storm, & other issues." Blizzard community manager Trikslyr responded to the post, so Srey's high profile has drawn attention to issues that have drawn a constant stream of complaints from players of the MOBA. Word is they are planning some further changes to the matchmaking system. Here's a bit:

There are a couple of changes we’re implementing in a future patch to make steps toward our ongoing goal of improving matchmaking in Heroes:

• A couple of bug fixes to help the matchmaker identify players that are closer in skill, hopefully resulting in more even matches
• Increasing the maximum wait time in queue to 10 minutes
• System improvements

Do note, these are not the only changes we’ll be implementing. We’ve got some more alterations in development that will continue to be released, the moment they’re ready, to help us further tune matchmaking. Some of the changes will be focused on:

• Improving matches at high skill levels
• Improve the New User experience
• Adjustments to make sure players in matches are close in experience, not just MMR

As for Srey, we’re looking into his account and identifying the matches that could’ve been considered poor experiences. We’ll also be assessing our point system to make sure a player at Srey's skill level won’t fall out of Rank 1 due to a couple of losses. In addition to this data from top tier matches, we’re hoping to extract information or identify bugs in the matchmaker that we could alter to make everyone’s match quality better, regardless of experience or MMR.