Explanation why new Veigar's Q is worse
Riots gave it range and ability to hit 2 targets, and skillshot mechanics for more fun. So main idea of this rework was make his farm overall easier, but... While older Q had lower range, Veiger could hit any minion. Now its skillshot and you can't simply hit minion with low hp in middle of pack. Else hitting 2 minions is defently will push your lane, and will make your farm harder - because find 2 low hp minions on one line is very hard, so you will kill one and leave another with low hp and your minios will finish him. Else all this dancing around minions will make Veigar more vulnerable, while as I'm understanding increasing range was made for opposite purpose - make farm safer. If we'll plus delay on his E we'll get much higher skillcap Veigar than before. I guess in pro hands new Veigar will be powerful - lower cds and more targets on his Q, but for usual players his difficult is soared to the skies.