I don't even think it's a matter of opinion anymore. MP games today need to have match making. Period. It's a basic feature that is an absolute must. There is absolute zero reason not to have it. If you don't want to use it, you don't have to. For the overwhelming majority that do want/need it, it's there for them too.
Especially if MM populations decrease over time. It's relatively easy to get a team together now. But how about in a couple of months?