Well, the fact that you are still raiding together at this stage of the xpac means you are good, so you should keep on to your members. In my realm almost all old school raiding guilds have collapsed.
In terms of performance, if you have been raiding since the opening of HFC, I think you are on the lower end of "raiding" guilds. Many guilds on wowprogress are socials who tend to raid every now and then. So yea, performance wise you have a lot to work on.