The answer to the question "is it easy" is probably no, though with enough programming effort it could be done (as nearly everything can).
- First of all, what would be the spec, if, for example, the ref would be on page 2, the first eq on page 3 and the second on page 5: "see equation (1) and (2) on the next page and page 5" or ".. on pages 3 and 5".
- Or if the first eq would be on the first page and the second on the third, should that result in "... on the previous and the next page" or "... on the previous page and the next page"?
Assuming those specs are defined, then
cleverref would need to get a completely different programming logic as it currently doesn't deal with that complexity at all.
Furthermore this gets very much into language structure questions and difference, i.e., in some cases we end up with "page" sometimes with "pages". For this there are no predefined language fragments stored for the various languages (which would need to get added).
In addition one needs much more than translatable fragments. In many cases the sentence structure very much depends on the target language as well (so you will need different logic at least for some languages). For example, if the eqs are on pages 3 and 4 I would prefer seeing "... auf der nächsten und übernächsten Seite" or "... auf den Seiten 3 und 4" (plural for page) or "... auf Seite 3 und 4" (no plural in that version). Thus the moment varioref would detect that it is the "next" page the sentence structure would change and move the word page to the end.
So in summary, I think this is a very interesting question but any automation as attempted by
cleverref will show limits in boundary cases and to overcome them you will end up with a lot coding and probably still some strange cases that are not catered for.