Meet the new appellate review, same as the old appellate review? That was my first thought as I read the Article 25 arbitration award in Turkey - Pharmaceutical Products, the first time Article 25 has been used for appellate review. But I have only just skimmed it quickly at this point, so don't hold me to that. After a more thorough read, differences between this award and Appellate Body reports may become more apparent.
My sense at this point, though, is that this award falls within the range of different types of Appellate Body reports we saw over the Appellate Body's 20+ years. The Appellate Body was not totally uniform over that period, as the reports read a bit differently over time. But this one seems to fit within the general framework of what the Appellate Body was doing. If a WTO lawyer had been in a coma for the last few years, came out of it, and was handed this report with no label on it and no context provided for what had happened to the Appellate Body, I think that lawyer would believe this was a real Appellate Body report.
In terms of substance, I'm just going to mention one point here, and it relates to a discussion in the comments of this post (there may be another point in the award that supports this, but I'm going to have to give it more thought). If you look at the panel's findings under GATT Article XX(d), they are very brief (see paras. 7.215-218), and mostly just refer back to its findings under Article XX(b). It's understandable that panels do this sort of thing at times, because they have a lot on their plate in examining the facts of the case and the full range of claims. Panel proceedings already take too long, and without these kinds of shortcuts they would take even longer.
However, a failure to provide a full analysis of each issue does increase the risk of error. The Article 25 arbitrators may have had this in mind when they said: "In our view, it would have been more prudent had the Panel followed the order of the relevant analysis and articulated the applicable legal standard in assessing Türkiye's invocation of Article XX(d) of the GATT 1994." (See paras. 6.154-164) The arbitrators ultimately found that "the method of analysis followed by the Panel" did not constitute a legal error in this case. Nevertheless, it's good to have appellate review in these circumstances, to provide a second look at issues where the panel may not have had time to do a full analysis.