If you dont know what her passive is , she gets increased resistances each time her team has killed a drake , since there will 4 drakes now in the game (5 counting elder) which is drastically less than the previous amount and since they are making it that drakes are a must have so almost everyone is gonna contest for those. so Shyvanna passive should be updated as well
So yes, Shyvanas passive needs an update, no there are not less dragons. In fact there are more chances for her to stack.
Right now Shyvana must clear as many dragons as possible before elders since she does not scale still (Meddler...)
That means she must get as many as possible between 5 min and 35 which is a maximum of 6. However, this is with pumping out dragons wasting time or missing an opportunity reduces it to 5 then 4 etc..
Season 10, 6 dragons must be slain for elder to appear. So no matter what Shyvana is going to get 6 chances. If the enemy are taking some of those as will that means 9 possible dragons can happen, but she can only get 6.
The first 2 dragons are random, the 3rd changes the map and spawns every time after at least 3 additional times until one team has 4.
Also, Cloud Drake will give ult CDR. 
ult is not affected by CDR. While there are other champions that will get little out of Cloud, she is the only one I know of that gets nothing from its main benefit. Which is a miss match with the niche Riot has previously tried to put her in when they gave her a passive that interacts with dragons.
EVERY EPIC MONSTER THAT DIES - ANYWHERE, ANYTIME - GIVES SHYVANA A STACK.
Captured Rift Herald - another stack... Elder Drake after Elder Drake... this is not a big deal... she gets SO little... just make it a game mechanic already, consider that Shyvana will get some paltry resistances from epic events.
I can't quite remember but I'm almost 100% positive that there has always been a max amount of 5 drakes, at least for the last 4 years.
Shyvana in general needs an update for pre-season. Her AP build shouldn't be a more viable option than her intended bruiser build...
That being said, her passive should never have been based around team objectives in the first place. The higher rank you become, the harder it is to impact your own passive because it starts to rely more and more on your team's ability to come together for objectives rather than your own individual skill.
needs a full rework, but until that happens they should change her passive. Any champion passive/ability that ties that champion to the jungle is not fun(except 
). I think her new passive should give her stats for the amount of fury she has, like 
getting crit chance. Her stats should be AD, attack speed, and/or AP based on how much fury she has. She would only be getting fury from basic attacks and not per second anymore. Her ult would need to have a proper cooldown and maybe have a reset mechanic since she wouldn't be able to stay in dragon form from basic attacking since it wouldn't be using her fury as a resource anymore.
