I'm pretty sure that a lot of oils us phthalate diesters as seal swell agents. Not sure how well these act specifically as lubricants.
I would have some concern with an oil with a very high diester content.
Diesters is a Grp V. Though it may have lower performance than complex and polyol easters.
I am more interested to know if this Edge 10w60 has similar spec and formulation as the good old Castrol Formula RS 10w60?
Perhaps favor among racers because of its HTHS of above 5 to provide best bearing protection?
Yes this is what others have said. SO previous have mentioned di-ester to be a poor version of ester, but in another post on hear i have read that Motul 300V is also Di-ester. It must still have its benefits.