The voting topic is a little vague.
There are basically four aspects to H4, Campaign, Spartan Ops, Multiplayer and Forge.
Campaign was okay - it was visually gorgeous - but had quite a few annoyances such as weapons disappearing within 12 seconds if you drop them and turn around, some of the race parts (the trench in the Ghost when the didact’s ship flies off, flying down the Trench on the Didact’s ship etc.) were just annoying, the Mammoth end mission where you get the target locator to destroy the Gravity Well device (you can aim anywhere and hit it) and no Theatre mode at all.
Spartan Ops was pretty good, especially the second half - but still it lacked many of the features of FireFight such as scores, showing medals, skulls, limited lives, more variability and Theatre mode. Also getting some of the achievements is ridiculous (like the number of Crawler Snipers you have to kill). One HUGE detractor is you can not play SPOps offline and have to have an XBL Gold account.
Multiplayer I gave up on June 6th and went back to Reach - mainly because of Lag, but the randomness and proliferation of power weapons are also significant factors. Of my 1400 H4 war games, 70% are lagged by 0.5+ seconds and that just makes it zero fun. It’s the lack of connection filters and the abysmal host selection methodology. I now play Halo Reach which picks the best player in a game for host based on their connection (No Host History carp like H4) and has connection filters like “Good Connection”. Only 5% of my H4 BTB games ever lag as badly as H4 did 70% of the time - so if I play 20 BTB games, in Reach I get 1 bad lag game and in H4 I get 14 bad lag games. I play 3 other multiplayer titles and NONE of them Lag as bad as H4 does. And the only reason I stuck with H4 was because each update or DLC release, I vainly hoped they would fix this Lag mess - but after 9 months of hoping - I abandoned H4 just as 343 has abandoned us players.
Forge I don’t build with, but I have read quite a few posts from people that have had serious issues with it compared to Halo Reach and earlier Halo titles, such as aligned objects suddenly separating when you save them, lack of fine alignment and other issues too.
So for me it’s below “meh” and after having played and still owning all the Halo FPS games since CE came out on the Mac, I have serious doubts if I will be buying H5 and an XBox one (that’s $620 USD folks for XB1, H5 and an XBL Gold account). I may switch over to Destiny, if it proves to be as good as it seems for multiplayer in the E3 Demos. Frankly, I do not trust 343 to deliver a good game experience.