I don't know where you begin as far as trying to pull a single dominant storyline out of last night's mess. There was the RISP-averse offense that almost seemed at times as though it was making a conscious effort to not score, the defense that stepped up in a big way precisely when it needed to, the relief ace that's looking more and more broken with each successive attempt to get himself straightened out on the bump, and the pitchers lodged behind that ace on the relief depth chart who somehow managed to bring the win once that same offense finally delivered in extra frames.
There was, however, something I did find rather interesting -- Adrian Beltre delivering a two-run single in extras in spite of the anti-clutch label that you could justifiably slap on him if you were inclined to do so. According to FanGraphs' win probability data, Beltre had cost his teams (Seattle in 2008-09 and Boston in 2010) more than four wins at the plate over the last three seasons as a consequence of his inability to deliver in higher-leverage situations, with last season alone accounting for two wins of that deficit. To be clear, the existence of "clutch hitting" in baseball has never been in question; the real question has been whether some players possess a preternatural ability to deliver more often in high-leverage "clutch" situations than others, or whether it's actually a repeatable skill -- and, if so, if there are then players on the other end of the spectrum who are demonstrably anti-clutch, as one might suggest Beltre has been.
This debate runs deeper than I want to go at this point, and, frankly, what's fact and what's fiction on this point doesn't matter so much in the daylight, because the only really important thing is that Beltre overcame his high-leverage-hitting problems of the last few seasons at a moment when the Rangers desperately needed him to produce, and, in spite of the identifiable flaws in his game right now (including, notably, the .307 on-base percentage), is proving to be the legitimate third-base asset that the Rangers paid out the nose for.