Jez New District has a 100 BBL capacity...and no one is talking about or liking their beers
it's not the size of your fermenter, but how you use it
seriously tho, there is no inherent reason why a big fermenter would produce better, or worse, beer than a smaller one. all comes down to the brewers, their ingredients and their processes.
I got to imagine they have to be thinking they should be doing a much bigger production
i would be most interested in talking to these guys, but i suspect that availability of hops is a major impediment to growth. top-shelf hops like citra, amarillo, simcoe and mosaic are simply not available to new brewers, at least not at reasonable prices - all the big guys have locked up contracts for those, for the next several years. small breweries can sometimes do "spot buys" for higher prices (i.e. what happens to pop up, when i pops up) but you can't plan an expansion around that. bigger production = need steady clients (restaurant chains, grocery stores, etc) = expectation of steady inventory of beer, AKA full-time availability. lack of a predictable hop supply undermines all that. and making modern/popular/west coast/etc IPAs without those hops isn't easy.
on the flip side, a small brewery like Aslin can stay nimble and do one-off batches as they manage to get interesting hops. as long as you're ok with a variable lineup, small breweries rock.