Since a Sense can be translated then the sense effectively applies to more than one Lexeme.
Likewise, a Sense can be tied to the same Sense on another Lexeme.
A Sense can (and ought?) represent a concept, however, some Senses cannot directly represent a concept (i.e. on verbs), because the sense is the concept.
Given these to things, why are Senses tied to Lexemes at all? Why not make the Sense a first-class entity that is referenced from a Lexeme? I imagine the referenced/created Sense would still be "embedded" in a Lexeme, but I don't see why it couldn't be reused on other Lexemes (especially when the Gloss can be translated as well)? or is there no circumstance (or very rare) where a Sense would be the exact same for multiple Lexemes?