These features do add value to the car, and first tilt and telescopic adjustment, and now this, I see both as a good convenience and should be present in every variant of every car. So yes, they do add value over Yaris. Now, the next most important thing will be price.
BTW when is Toyota giving facelift to Yaris? Its been 2 years. Indus have been good with facelifts, and have been adding lots of features, I mean compare the Corolla Altis Grande 2014 with 2020/2021, the difference in features is huge. I am expecting the same with Yaris, I am expecting they will match the top variant of City. Will most likely add retractable mirrors, tilt and telescopic adjustment in steering, cruise control. Based on sales and feedback, they might add rear vents and sunroof too, but they are less likely in my opinion.