If he's in charge, and he's 'old school' then why does the game not seem to satisfy people who are 'old school' and want something different from what 5e provides?
So, be careful there - your statement is subject to possible non-response bias.
Say there is a population. 90% of that population is perfectly satisfied. They go about their business, buy some product, and do their thing quietly at their own tables. 10% of that population is unsatisfied, and complain.
The 10% say, "Look! Our population is not served, we are unhappy!" and we get the idea that this is true, when, in fact, 90% of the population is fine, but we miss the fact because they are not part of the conversation, because they are happy.
What we can say is that there are some people who are 'old school' and not satisfied - we have some here. So, they exist. We cannot, with the information at hand, say that in general people who are 'old school' are not satisfied. To do that, we'd actually have to know how many old school players even exist.