I usually don't find debilities useful for basic natal chart reading. Better to explore the sign characteristics involved, and the house involved. Waybread's description of Libra as a partnership oriented sign is the kind of thing I'd read for when just giving an overall picture of your chart.
Where your sun being debilitated might be relevant is if we're considering matters related to the house it rules. Which of your houses has its cusp in Leo? If it's the second, maybe your finances need some extra work to make them secure. If it's the sixth, there may be a somewhat higher than average chance of chronic health issues. If it's the seventh, it may be extra challenging for you to balance partnership needs with individuality. Something like that.
My sister has a Libra sun and her IC in Leo. She's just now, in her early forties, looking to buy a home for the first time. Up to now, she's rented and had to move every few years. A fixed sign IC would suggest a need for a stable home of one's own (I've suggested that to her, in fact) and not so much inclination to move, and it's what she really feels she needs, but it's not a need she's easily met. That doesn't mean it's impossible, just not coming as quickly and immediately as it would if the IC had more going for it.