Depends on your age, if you're young, you do want it because your risk tolerance should (in most cases) be much higher than someone who is close to retirement.
[1] https://www.proshares.com/faqs/geared_investing_faqs.html
Most IRAs don't have it without permission.
Timing, take a look at Nov 07, had you bought a leap then, it would have taken until Jan 11 to just break even, you're really pushing the limit of the max option expiry at that point.
All ITM leaps have extrinsic value, even if small. Take this value and divide by the strike price, this is your effective "interest" for not having to spend those dollars to purchase. Depending on your delta, this percentage could be higher than the expense ratio of TQQQ.
Or just buy leaps on TQQQ then :)