I completed Dead Rising 4 (with Frank Rising dlc), and sadly for me the game is a mess.
First, the game is not funny. Capcom cut out all the features which made Dead Rising...Dead Rising.
No timer, no survivors to escort, much less exploration involved compared to Dead Rising 1 (many stores are closed and you can't enter it), boring plot, awful writing (Frank West was never the asshole described in this game), graphics are average, uninspired artistic direction (why there are only christmas-themed music in the game? Really? There's NOTHING about christmas in the game if you exclude a tiny 20 seconds comic-book cutscene in the beginning of the game, and that didn't even involve Frank. If you want the "x-mas atmosphere", you need to take out your money and buy the x-mas dlc), no psychopats, awful sides (in fact I skipped ALL of them, it's simply pointless losing time on doing them), the game is so easy Capcom needed to patch in an hard mode for it after the release.
But the nail in the coffin is Frank Rising dlc, basically Capcom locked out the Overtime mode with the REAL ending behind a 10€ paywall.
What you got for free in ALL preavious games, here's locked behind a paywall, and of course it's stuff cut from the main game just to place a dlc for the title (well, excluding useless weapons you can buy) with pretty much no job behing (I won't spoiler anything, but the dlc has ZERO, and I repeat, ZERO new contens or locations compared to the main game, you are in the same place, you backtrack to the same locations, the only different thing is gameplay's side, and it's not even a good one in my opinion).
After this chapter I honestly hope Capcom will let the franchise die, because in the time they did an awful job.
Dead Rising 1 was something unique, Dead Rising 2 was still enjoyable, still it felt a more of the same in western sauce, DR3 was terribly boring and dumbed down, but 4 is the game nobody asked for.
EDIT: Final note: the game is VERY short. You can complete the main story in 6-7 hours, and the dlc needs around 1 hour to be completed, less than 90 minutes anyway to 100% it.