No but then Sylvanas has never set up concentration camps and shooting squads against members of her own faction has she, or murdered or attempted to murder any of her faction leaders for simply disagreeing, so it all depends on what you focus on to make one or the other look worse. I find it ironic you source Saurfang as the one with issues, when it was his own crippling sense of honor that stopped him from executing Malfurion to crush the Night Elf spirit and make way for a relatively easy occupation. But no, because he put his own personal pride above the rest of the Horde, Malfurion got away and with him the chances of taking Teldrassil with minimal bloodshed. So, I take no credibility from Saurfang objecting to this when it was his own values that inevitably lead to the burning of the tree in the first place.
Also, I would like to add that any "Sylvanas should have done it herself" argument is moot because Saurfang was agreeable to this invasion and he upholds a sense of honour loyal to the Warcheif so from her POV it would not occur to her that he would suddenly disobey like that. The expectation would be for him to simply follow her orders. Granted, there was nothing stopping her doing it herself, but at the same time it is an irrelevant point because she should have been able to rely on her 2nd in Command regardless, as one should when following rank. But he didn't, so that ultimately makes him just as responsible as her for the burning of the tree. We must all remember, this was not the original plan - the purpose was invasion and occupation, but the burning was the only option left for the mission to have any meaning or success at all, despite how despicable it might have been. Of course we will never know for sure, but I am sure others can totally imagine Garrosh doing this if he was in the exact same position - can you imagine him backing down from conquering an Alliance city after one of his Generals just disobeyed him and possibly compromised the whole mission? No, not likely.
Just because I feel the target was legitimate, do not misconstrue that to mean I was happy to see people die - I am saying that as a military target, for the purposes of cutting off the Alliance and to strengthen Kalimdor as a continent was legitimate reasonable. The means by which that had to be achieved though, through destruction rather than occupation? That is something I can empathise with the Alliance on - unfortunately, it was the only option at the time and one I perosnally wish Blizzard had never forced on the Horde to do