The low gravity gives KELT-11b has an exceptionally large scale height of almost 2800 km. The scale height is basically the vertical distance in a planet's atmosphere over which the atmospheric pressure changes by a factor of approximately 2.718. As a result of its large scale height, the planet's atmospheric transmission signal is expected to be relatively large, making KELT-11b a good target for follow-up and atmospheric characterization. Currently, the host star of KELT-11b is the brightest star in the southern hemisphere with a known transiting planet.
Estimated atmospheric scale height of known transiting hot Jupiters versus the V-band brightness of the host star. KELT-11b is indicated by a filled green circle. Pepper et al. (2016)
Pepper et al. (2016), "KELT-11b: A Highly Inflated Sub-Saturn Exoplanet Transiting the V=8 Subgiant HD 93396", arXiv:1607.01755 [astro-ph.EP]