Here's my problem with how this game's handled balance-wise now.
A player commented
How about a lower value that doesnt get removed when in combat :l? 10-20-30 incombat movementspeed can be quite strong, and thats what i mainly see people complain about
To which Meddler replied with
That'd certainly make it strong, we like the idea of strategic mobility (as opposed to mid combat) because it changes how you play when you've got the buff or are playing against a team with the buff though. In combat movement speed by contrast's a generically good stat that doesn't change decision making as much."
Talking about a 'generally good stat that doesn't change decision making as much' when Infernal Drake is considered the best drake and just lets you roll over teams with the damage buff.
In-combat movement speed is a more balanced 'generally good stat' for a drake to have because it makes you better at team-fighting without making you essentially better at stat-checking.
If anything, Cloud should provide general MS while Infernal is adjusted. Neither would change how you handle situations. They'd both just makes you stronger; simply make it so games are in the favor of those who take it, which wasn't the intent of the drake changes that came with 6.9. However, Cloud would be more balanced and make the game less absurdly one-sided as it is now with Infernal.
IMO, both should see changes, since neither really currently change decision making. However, for the Rioter in charge of balance to say Infernal is fine while Cloud would be a problem with general movement speed is laughable. Infernal is as 'general power' as 'general power' gets.