Yes, progress is rarely linear. On the other hand, what is perhaps a source of concern is that Lampard doesn't quite know which direction to go. For example, everyone knew the direction of Arteta's project at Arsenal, but the results were not forthcoming. Meanwhile, the performance was partly encouraging, and the underlying statistics were positive. Something he himself was ridiculed for.
I struggle to see this in Lampard's case. I don't care if he gets fired or not. In general, it is difficult to see any positive future for Everton. We just repeat the same mistakes. I can hardly bear to watch them play anymore. The Moyes period is just a distant memory, but god how I miss it.