Well, for the price of a pH controller, you could buy a solid used single or dual stage regulator, and you'd never have to worry about EOTD.
You'd also have a jumpstart on upgrading from the Milwaukee, which, if you keep with the hobby, you'll almost definitely upgrade from over the next year or two in any case.
I'm not a pH controller hater, but I've never owned one, and have never seen a good reason to. The one benefit, aside from preventing an EOTD with a crappy regulator, that I will acknowledge, is that as you dramatically increase or decrease plant mass, CO2 will be consumed at a slightly different rate, and a pH controller will deal with that change. Whereas, without a controller, you'd have to manually change your flow rate via a needle or metering valve. However, if you keep your CO2 on the high end to begin with, this is a moot point.