It was funny (the father moments), but I don't miss them.

In the narration it was said earlier that something about Hikaru and Tamaki and Haruhi would be the beginning of the end of the Host club. So I'd say yes. The Host club is probably to coming to an end. But I don't know how long until then, so I choose not to worry about it, everything ends eventually.

The only problem I can see in the epic Tamaki vs. Hikaru battle is that Tamaki and Haruhi like each other, so it's not so epic, seeing as Hikaru doesn't have much of a chance.

Well the Manga also said that by Tamaki starting to pursue the family business it results in the Host club discontinuing also. :(
It will end eventually but hopefully not for a little while.

Tamaki involved in business was a little scary and it really worried me, but it seems he has already forgotten how he wanted to become more involved.

To be honest, when I started reading Ouran (I read it before I watched it) I never thought about it ending or even considered it. So, the idea of it all coming to an end isn't a pleasant one. But I'm sure it will become necessary eventually as all things come to an end.