I did say however: If we had figured out a way to solve the issue while we continue using Direct2D, we would've definitely sticked with Direct2D. Since there was no solution, there was only one other way to solve it and it's a way that has many other terminals already do it.
Despite the apologies you or your team have given, you continue to denigrate and downplay. First, Casey's suggestion "doesn't help much"; then, "Casey's suggestion wasn't unique". And so on. Casey suggested a solution, spent time proving it was easy, and you even used the suggested solution to good effect, and you're still trying to downplay Casey's contribution or involvement.
If Casey hadn't kept pushing, it's doubtful you'd even have gotten around to doing this, so some actual credit is warranted, along with perhaps a real apology.
It seems like you managed to optimize Direct2D with your 'glyph cache' pixel shader but that doesn't mean caseys suggestions were pointless.