If the Libertarians get in the debates, they will likely poll close to 10%. They will become a meaningful way to vote for "None of the Above".
Yup. I'll probably be throwing my vote to the Libertarian, given that California will be voting for Hillary and I'd like to see viable third party candidates running in the future. I'd love to see the Libertarians end up with 10% of the vote -- that would be HUGE.
But no, it's definitely an unusual cycle, but there's nothing "weird" about Trump running. Honestly, I'm a bit surprised that it's taken this long for a non-politician to throw his hat in the ring.