Warwick W Blood Scent

I think the new is excellent, I loved his concept before he was reworked just not so much his kit and his new kit I enjoy a lot however I feel like his W Blood Scent needs a little work. I've notice that it won't always sense the enemy, mostly the enemy jungler, when they were low and I know they must be below 50% HP but I was looking at an enemy jungler in a bush I warded and his health was extremely low but I didn't get a trail to them or increased move speed to them. Secondly, I've noticed, is that if your running to an enemy with Blood Scent on them and your running a straight line at them, say red team red buff to top, and an enemy is in between you and them in the fog of war you lose the movement speed and have to run in circles to find a way that gives you speed because the game doesn't say your running to them cause someone is in between the two of you. Thirdly, I think instead of dropping his speed instantly after the enemy gets above 50% HP or dies, I think, it should decay over a period of time, like 2 seconds, back to normal. Lastly, I think the blood trail itself needs to be looked at because I find that it changes your pathing to an enemy being sensed a lot, even when you are closing in on them, I think it would help stop any confusion and would improve tracking down your unsuspecting targets. Those are some problems I've had personally with new Warwick's W Blood Scent, not always sensing targets below 50% HP, breaking your bonus movement speed if someone gets between a sensed target and Warwick, the movement speed drop after targets are not sensed, and the blood trail tracking, and I would like to thank you for taking the time to read my post and hope that you would at least consider my ideas when you look at any Warwick adjustment.