I stopped watching this show at the end of Season 4 because it just wasn't grabbing me anymore. But I did watch the last episode. I think having a clip show was a fairly good idea but poorly executed. Instead of having it be ONE defining moment, it should have been moments - then they could have mixed it with highlights from previous seasons and new clips of other ideas they had for future episodes. I liked the tap dancing but thought it went on a little too long.
I think a better idea maybe would be a meeting set say 20 years in the future with the Warehouse getting ready to move. Artie could be retired (but living at the B&B as crotchety as ever in his wheelchair), Myka being in Artie's job, Steve being lead agent, Pete coming to visit and complaining about his teenage kids, Claudia acting like Mrs. F in front of the other agents, but dropping it and being "Claudia" when its just our guys, and then they could all reminisce about their favorite moments as agents, which would be the clip show. Artie and the apple could be the final goodbye.