I would. Kowloon, Wanchai and Causeway Bay area are all lively (and now safe again) late into the night. I personally like walking and eating in Kowloon at night. The Marriott airport hotel is just a Marriott in the middle of nowhere. I stay there when keynoting events at the exhibition center or meeting the Cathay folks.

Aside from that, it has nothing going for it. HK the city is just too nice not to explore.

That said, I'm not sure how much you prefer exoring the cities vs spending time in the hotel. The suites at the Marriott are decent sized and the breakfast decent. Last time the club was semi closed so not good. Not sure what it is like now.