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.
Saving grace worked for Everton this season just like the last one, this is obvious, their last match was very peculiar and grace narrowly did a good job. Still, the club has a whole lot to do, this season and the immediate past were so bad for them and I didn't expect them to be fighting for their survival in the EPL. And talking about the squad, I agree with you, the squad is okay, at least to an extent, but when the squad is not connecting is a problem. This definitely can't be a training or managerial problem in my opinion, but the issue of morale and believe. The hope was somewhat lost in the first half, but the saving goal of Abdoulaye Doucoure made the day some minute after the second half. They still couldn't continue with the scoring due to their skriking weakness.
As for Lampard, his time at Everton was short, I don't know how coaches are expected to do the miracle so suddenly.
It's not the first time for Everton because they were like that last season and it's lucky they're still here now but that doesn't mean luck like this will keep coming their way.
As for Lampard I think it's quite funny to say that he's been a while because indeed he's been from the previous season even though it's also been in the last few games and he mixed Everton players from the start of the season so to say a minute is ridiculous.