This is possibly meant for innate synergy with two of the new Warframe Arcanes also coming with Techrot Encore. Even without them, it makes Sol Gate somewhat more useful with the rest of Wisp's ...

Kaya acts as the self-taught engineering genius of the new crew with a special interest in cracking time travel. Flare is the human form of the 60th Warframe to be added to the game, Temple.

That's alongside Flare's new Stage Defence missions ... and quality of life improvents, including Warframe augments for Gyre, Qorvex, Koumei, and Wisp, plus a Pseudo Exalted Rework for Kora ...