clearstream
(He, Him)
To me the Shield Master evidence points the opposite way. JC's undid his 2015 post with his later ruling, vexing expert players and helping out casual players. Further, to hang the argument on this one example would be cherry-picking.Some of the other commonly complained-about rulings counter-indicate this. It would be more permissive to rule that you can attack before or after making a shove with shield mastery, or to rule that Paladins can smite with unarmed strikes. I think the evidence points to him leaning towards the most literal interpretation of the wording possible.
In a score of places in the SA the writer literally says "the intent is" or "the design intent is" or words to that effect. It is to such contextualising explanation that I refer.I’m not convinced UA rulings indicate design intent. The ruling on magic shields seems to me to favor the letter of the rule over the spirit, and I very much doubt it was the intended interpretation, though it is the most literal one.
Actually, that is one of the issues. The interpretation amounts to saying that combat can't interrupt long rests. As between combat and walking, it would always be the walking that was telling. Seeing as combat might be at most few minutes, it practically speaking comes down to how much the characters have walked. It is always poor design to include conditions that don't count. (Or shows lack of sufficient playtesting or experience with the game, which I would hope to rule out here!)This disregards the far more likely intent that combat alone is not meant to be able to interrupt long rests at all, but that combat is meant to contribute to the total amount of time spent engaging in strenuous activity. For example, walking for 11 minutes, participating in 10 rounds of combat, and repeating this process 4 more times would break a long rest.
One might in fact have sufficient combat as to span multiple game sessions - without interrupting the rest - and it would still come down to the walking. Do the players go that extra 5 minutes, or take a smoko!? None of the examples of the fabled mixture of activities anyone has yet given comes across as plausible in play at the table.