I don't play Veigar, but...
I was just playing a game as Udyr jungle, and what I saw in midlane was nothing short of pitiful.
Whatever fantasy existed of scaling into the lategame with 1k AP poofed into nothingness. Our Ahri was absolutely dominating him. Even I had absolutely no trouble with his cage. When I saw the indicator, either I simply dashed through it to catch up, or I took my time around it and ended up where I wanted anyway. Think I got stunned maybe twice in the entire game.
When I first heard of the Veigar changes, I was quite glad to hear that we'd finally be getting some meaningful chances at countering his kit, but when I compare it to what it is now I believe the Q changes should have been enough to put him in a correct spot.
I am personally for reducing the delay to his E to 0.5s, maybe even 0.25. In my opinion, the point of the indicator should be to not get stunned immediately and not to allow the enemy to quite easily waltz out of the entire area before any danger hits. It should be very possible for Veigar to lock someone in his cage, even if they don't run into the walls. With his Q and W to dodge in the confined space, it puts both Veigar and the enemy to the test.
To all the Veigar players out there. I feel you. I really do.
nerfs.