I wouldnt underestimate her at all. The alt right is getting stronger in Canada. The next election will be awhile and that is enough time to make this movement grow.
If conservatives can deny her the leadership role then yeah thats a great thing but right now she has the same chance as the liberals. Remember, every election they start from zero. Most people that voted for liberals arent loyal to the brand. They can split the votes to the conservatives and NDP. That is all they need to win.