Everton team was in real danger this season until the last round i did not expect this poor performance from them with the good squad they had i think their main problem was their offense they only managed to score 34 goals in 38 games which is really poor for a team with such history i hope they correct their mistakes in the next season and they sign a good manager and some good players.
They actually have a good squad but the problem is they lack squad depth and it affected them along the way which was one of their major cause of downfall this season. They also lack good management, Lampard failed to be the coach for them, some of their in-form players like Gordon lost his form when Lampard took charge. All this things contributed to their poor season run which almost saw them relegated. The likes of Iwobi and Onana was excellent at the beginning but towards the end the whole team seems to have lost the spirit and they gradually dropped to the relegation zone. They are lucky to have escaped relegation. They will comeback stronger next season i believe.
Everton should have taken the right steps like Aston Villa because in the end, Aston Villa managed to rise only by changing the right coach for the team. But yes, with Everton's poor performance from the start of the season then I will probably regret Everton's decision to sign Lampard as their coach. So that Everton took serious steps to sack him and fortunately Everton, who in the end managed to escape from the relegation zone with tough competition with Leicester.
Aston Villa's cunning in bringing Emery is to be commended in this regard but for Everton they also did the same but indeed the substitution had no effect whatsoever.
On the other hand, in this case, letting Lampard stay there for too long is also one of the conditions where this is indeed a bit wrong in my opinion because if they had tried to do it from the start maybe the current conditions could have been better. but indeed with their condition fortunately they avoided relegation and returned to playing in the EPL next season.