An actual increase in the volume of comics criticism is not necessarily desirable or even achievable considering the state of the industry and art form.
Comics criticism doesn’t actually need more people who are interested in comics (that is a given considering the insular nature of the hobby); what it needs is people who are interested in criticism.
Comics must be the only art form where the most prominent commentators in the field (who shall remain nameless) regularly dismiss or deprioritize discussions of the art form they are engaging in.
If you want to sell things, then sell them—send them to famous cartoonists, influential publishers, and comics critics who are interested in selling things.