So you are hearing complains from all your users or specific department (users using High End Apps or Resource consuming apps)
Rather than going back I would suggest move forward Ru7Mp1 is out there from some time now.. try that..
Havent heard RU7 having this "issue" so it is environment specific..Try excluding the more resouce consuming applications from scanning.
Also you can open a support case so that a Engineer can diagnoze if there is any scan conflict or any other issue.