Among all guest-stars who played the potential mother, I only found Ashley Williams , the actress who played Victoria, to be the one matching the energy of Ted, Barney and the others.

Miloti came to late, was too tame and didn't stay long enough to be interesting, outside of being "the mother".

Is there really a plot in sitcoms? Was there a plot in TBBT outside Leonard trying to seduce Penny? or in HIMYM outside of how Ted met the mother (forget 90% of the episodes)

And I don't think the problem of HIMYF is the plot or lack of filler, first problem IMO is the characters and their respective actors. Like someone said in another thread, you can easily complete season 1 without knowing the names of the 6 main characs.