Fr Ray Blake on his blog [here] gives as good an explanation as I have read recently as to why those of us who are sympathetic to the Ordinariate have no qualms whatsoever about Anglican clergy being (re)ordained to serve in the Catholic Church: (my emphasis in bold type)
"It seems to be that all the Church is saying now, is that there is a deficiency in the Orders of those ordained in the Anglican Church who now seek ordination as Catholics. They might have worked in the CofE, they don’t work in for RCs. I can’t help but see a parallel with how the Church speaks about unbaptised children nowadays. Today we acknowledge the necessity of baptism but we avoid mention of limbo and instead we speak about the infinite mercy of God, simply because we know about and can be certain of Grace of the Church in the sacraments but in the dark world outside of the Church we simply do not know, we only know there is a problem.Read it all.
Our big problem with Anglican Orders is not the past so much as the future, as far as Catholics and Orthodox are concerned every Ordination in the future will be invalid not just because of the involvement of female “bishops” but simply because the intention is to do precisely the opposite of what the Church intends, bishops and priests will be ordained, not for the Church catholic – I use the term in its broadest possible sense- but for those Christians who accept their particular orders, in that sense Anglican Orders are divisively anti-ecclesial."