1. Make the Subject Line of the Premades more streamline so things are easier to find when searching for group especially because the "Premade" column is sortable.
2. Provide a search feature to allow a query for a premade. Would be particularly nice to have if #1 (see above) is also added.
3. Add "Denied" message to person looking for a group so that we know they don't want you in the group. Often you put yourself on the waitlist and then just sit there no knowing if the group got it. Then if the user gets denied, change the "wait list" icon somehow to show thi (ie. color, verbiage to "Denied", etc.) to make sure we don't apply to the same group again.
4. Provide an ability to better sort out Fresh groups versus Partially Completed groups. Not sure how to do that. Perhaps color the entire line?
5. The pace of the entries getting refreshed is really fast making it hard to actually click on the "Wait List" button. Not sure a solution other then sorting by date created (which would need to be added).
6. Raids: LFR's shouldn't be in raid list. WoW already groups up LFR's. These add to the congestion imho. Should really be promoting Normal/Heroic raids. Perhaps a way to separate Flex with Normal/Heroic would be helpful too?

Re: #5
When you are looking for a group, there is a pause button at the top right, it looks like: **PAUSED**

Just click that and it will freeze the screen for you. Click it again to remove it or just let it count down.

@Malthmazer
many of your suggestions are covered by the spyglass filter at the top left, fifth button over. when you click it, you'll see a cursor enabling you to type your selection.

the spyglass filter allows for some regular expression capability when looking for a group.
ie:

all soo raids: soo
all raids except soo: !soo
all normal soo raids: soo & normal
all old content heroic raids: !soo & heroic

of course, these are just for raids and you should select the sub category 'raids' at the bottom center

this would cover your suggestions #1, 2, and 6. Warlockjen's suggestion covers #5... which leaves #3 and 4

#3 is an idea that has been brought up before and i'm unsure how to implement, tho i have a few ideas.

and i'm unsure whether or not i should implement anything like #4. maybe instead of 'newness' i could sort by size of the wait list. i think that might be more useful

Personally, I'd like to see a checklist option of voices. People who may have some voice options on their computer but no others could checklist that they want mumble for example, but uncheck any vent using groups. Or people who only want a group using some kind of voice that could uncheck the no voice option.

@Tarkan
the first pull down on the lower left side is for VOIP type selection.

left clicking will select a specific voip type

right clicking will de-select a specific voip type (ie: hide groups using that type)

You think of everything <3

Oq has most everything you can think of luckily such an amazing addon A++!!!!