They are technical issues that become competitive issues because of the presence of a strong, vertically integrated competitor. And I highly doubt Samsung's ability to create a competitive ecosystem; they have had the chance across a number of product categories and failed.
Developers having to do work is absolutely a competitive issue: it's erecting a barrier to entry through regulation because it drives up the cost of developing an Android app. For many developers, it would likely drive the cost beyond the point of feasibility.
And the market is likely at the point where even if the restrictions were relaxed, companies wouldn't take advantage of them because the market has already settled on Google and Apple. But if they were relaxed, it would likely be the end of Google's support of AOSP, which would further hamper the ability of OEMs to develop their own platforms / ecosystems.
If those restrictions were removed, Samsung would likely remove most Google Apps from their ROMs in the next update. They'd keep the Play Store and Maps. Maybe YouTube.
Most other OEMs would take longer to set up their own apps, but they'd all follow suit.
Developers having to do work is absolutely a competitive issue: it's erecting a barrier to entry through regulation because it drives up the cost of developing an Android app. For many developers, it would likely drive the cost beyond the point of feasibility.
And the market is likely at the point where even if the restrictions were relaxed, companies wouldn't take advantage of them because the market has already settled on Google and Apple. But if they were relaxed, it would likely be the end of Google's support of AOSP, which would further hamper the ability of OEMs to develop their own platforms / ecosystems.