a complete one off & I send my love and deepest condolences to his family

[kadioguy]

[From J.K. Rowling's Twitter page]

I'll never know anyone remotely like Robbie again. He was an incredible talent, a complete one off, and I was beyond fortunate to know him, work with him and laugh my head off with him. I send my love and deepest condolences to his family, above all his children.

https://tinyurl.com/2ha4yoca
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1. Is "one off" this?

one-off
noun
(British English)
a thing that is made or that happens only once and not regularly
It was just a one-off; it won't happen again.

https://www.oxfordlearnersdictionaries.com/definition/english/one-off_1?q=one+off

2. I send my love and deepest condolences to his family ...

"Send" is in the present simple. Why? Is that use like this? "I announce ...", "I declare ...".

 

[5jj]

1. It's more like the second definition here: https://www.macmillandictionary.com/dictionary/american/one-off_1
2. Yes.

 

[Tdol]

It looks odd to me without the hyphen.