I would say no to the suggestion as proposed.
I agree with many of the points from people on both sides of the op. What confuses me is that there only seems to be two distinct sides to the debate. Did I miss it or did anyone sensibly ask if there might be some compromise somewhere in the middle of all this, some grey in between the black and white?
The introduction of reaper followed immediately by racial tr in it's 3 x10 races format is in my mind insane. +1 skill point for 10 different lives the first time you do each race? That's grind to the extreme and really just plain stupid. And frankly I'm surprised there wasn't a whole lot more resistance to that insanity on Lamannia (there was some resistance but there could have been more).
So, no, maybe account wide xp for playing one toon only isn't reasonable, but maybe there could be some changes made. Like xp bonuses after you get 2/3/4/... toons to a certain # of past-lives, or y% of the xp you earned goes to other toons on the same server, or whatever. Something the helps make successive alts not as grindy to level up as the first character(s) you play.