Just think of it as being able to get the games you do like when they show up. The games are from the Developers/Publishers and are given away for free so I can see why they are being spread out.
I think it takes a month to get about 4000 coins so the 2 week window isn’t enough time to get the next games that show up if you spent coins on the last batch. The daily coins is a good way to keep people coming back even if the aren’t active in the community if they want to get more games later.
I haven’t wanted anything since Slayaway Camp. The games are free and something you like will show up eventually.
You could also throw some of the titles you would like to see, on the site or coin shop, into the Suggestion thread or make your own thread about them.