Weekes is my favorite Bioware writer, all the characters he wrote for Mass Effect are in my top favorites and even though I wasn't that hyped about Solas, Cole or Iron Bull before release I knew I wasn't going to be disappointed if I gave them a chance. And I wasn't.
So, yeah, I'm quite happy about this change in leadership though I wonder why Sheryl or Mary didn't take up the mantle since they've been there since the beginning, especially Sheryl given she was sort of a 2nd in command to Gaider for DA2 and Inquisition, before Patrick also joined. Still it will feel weird without Gaider.
Hey, at least Leliana's writer is still here, both Gaider and especially Weekes seem to like her a lot (given they've both seem to have gotten their hands on her character while writing the novels), so I'm overly positive about this change, though I wonder if this means Cassandra, Dorian, Morrigan and Alistair's storylines have come to a closure, cause it really seems that is the case.
Excluding Dorian, I feel the other three characters appearing in more than a cameo role in future games would seem like a drag on for the characters. 