>This is an absolutely terrible design change, and i have no idea why they did it.
As noted above, Apple tends to on again/off again features in the tools just for the sake of it. Xcode isn't the only example, look at Photos... Death by a thousand changes, when only a handful over time were actually improved new features.
More about changing the landscape so the manager thinks they've done real work, where anything different gets passed off as progress, even if it means putting something back the last engr. just took out, while bulking the resume in the bargain, than it is about fine-tuning existing tools, genuinely making them better, earning a loyal user base in the bargain - they seem to think that it helps to keep users on their toes if they change the furniture on a regular basis, relying on some sort of stumbling 'discovery process' to promote learning, squelching hard earned workflow habits that might lead to...ghaa ..stagnated curiosity.
Heaven forbid they build trust in the tools, instead. Let's reap discord - keeps the louts on their toes.