a. I'm not so sure things on Merseyside were as rosey as you claim either, I'm pretty sure there was a level of bitterness if not on the surface, the just slightly bellow it always waiting to come out in the Euro Ban years... But I can understand why Liverpool and Everton came together post Hillsborough. .. that makes sense to me, and is something they (Everton) deserve a great deal of credit for.... for the Record, I have heard plenty of Arsenal supporters bemoan their lack of opportunity to have recorded at least 1 European cup victory. The comparison is questionable as all can admit that there is something very different when it is your crosstown rivals that have brought something like this down upon you.
b. And we are all looking at the benefit of hindsight here... but I'm not sure that we could fully appreciate the impact of the Euro ban back then especially the coming reforms to the structure of the game that were about to hit us in the early 90s. The RAWK poster suggests that both Everton and Liverpool were caught flatfooted as the Premier League era unfolded... and in that regard he is right... But what he is wrong about is just how much of an impact that had Everton FC as a whole... Everton had just come out of having had one of the best sides in their history, the fact that they were never able to see their true promise realised is a bit of a tragedy. Yes there is no guarantee that they would have won the European Cup (though I think even the most die hard LFC fan would acknowledge they would have had a pretty good shot at it) but if they won it, you could very easily argue that it may have been the springboard to even greater success... and as we know at United, success brings with it an added incentive in attracting top talent... top players want to play for clubs who have a shot at winning things. Sadly having been denied the opportunity at glory in their golden period, Everton were on the way down by the time the Premier League came calling... But since I am speculating here its not much of a stetch to suggest that had Everton entered the premier league era as one of the top sides their fate might well be very different.
This is of course all speculation, and there is no guarantee that things would have turned out any different than they did (quick check of the 87 European Cup would see Maradona's Napoli side going out in the first round to Real Madrid while lesser sides advanced)... but I find it absolutely shocking that most LFC supporters will continue to bash Everton as a 2nd rate club, when they played such a large part in shaping the path that the club was to follow.... and then turn around and use the plight of the club as a stick to bash them with.