Thinking about 8th edition WFB, 10+ years later...

I think you miss all the monsters that don’t se play because of cannons. You are just comparing with the best ones that see play. There are a lot of character mounts and normal ones without ward saves that is just unplayable because of them. That’s my main problem. There are great models never played.

Some would be fixed with changing the ridden monster rule too(combined profile).

I have had my fair share of turn one/two game over.
Even though it is like 1/10 chance, to give that to my opponent makes I rather not play a tree lord ancient and go for other choices. same goes for my forest dragon. If I am up against dwarfs, skaven I will not play it as it will determine the whole game.

You are also missing the strategic point of the cannons. Because of their strength they give huge board control. Even though they miss they still pay back in giving you the choice of where units goes on the field and help out picking battles on who fights who. Who would not pay 250p if it would allow you to pick all battles?

I would rather see cheaper and more random cannons. But then some armies would also need compensation like empire and maybe dwarfs.

But yes it’s the mounted chariot cannons I see as the main problem.

I think cannons get the brunt of the complaints because monsters in generally can so often be underwhelming. If they aren't T6 or have a ward/regen then they'll die to pretty much anything. Most are S5 T5 with maybe a 4+ save which basically forces them to only fight S3 T3 infantry, and even then they need a good thunderstomp to offset ranks/banner. Low I doesn't help, especially with not striking first on the charge anymore as a weak monster may just be dead before it even gets to attack.
A good counterpoint to this though is that they're supposed to be support units rather solo powerhouses, but as already mentioned a lot of people go for a point and click approach to the game.

Quite so. As I have argued from the start of 8th edition, there is only one change needed: a return to 6/7th edition rules, which randomised template attacks against ridden monsters.

My main issue with cannons (which I've both played with as Dwarves and faced with my various other armies) is their method of hitting compared to equivalent artillery, such as bolt throwers. Bolt throwers are notoriously hard to hit with, as they're often shooting stuff the opposite side of the board, and are hindered by the crew's (generally) poor ballistic skill. Cannons do not take the ballistic skill of their crew into account, and there's nothing to reflect the fact they may have shot a bit to the left, or perhaps a bit to the right of their target. I don't have a "solution" for that, as I like the whole "does it bounce / how far" aspect of cannons, but their method of shooting doesn't seem quite right.

I do think the effect of cannons is often overstated, and when I've faced a trio of Skaven big nasties careening towards my Dawi line, I'm grateful for what they offer. But on the flip side I do feel they overly discourage the usage of monsters, especially ridden ones. And I am a big fan of monsters.

Also, I think everything that can be said on cannons in 8th has been No-one's changing their minds on it now.

----------This is my main issue with cannons. Why did they change this? 

To add: the overlap of the 8th edition BRB and the 7th edition Empire AB was the only time (in my experience) that the Empire could be considered a 1st tier Army. And that would have been achieved even without dispensing with randomising hits on ridden monsters.

Be honest: the most annoying thing you find about cannons is that they can actually kill stuff, with or without pre-measuring.