Wasn't the last time Shirou had sparred with Taiga & Kiritsugu 5 years ago, and that after Kiritsugu died, he stopped kendo lessons?
About the only thing I'd say Shirou has currently is his own durability but I assume Yusuke is tougher than that at this point? It's been a long time since I've watched or read YYH.
I mean the last time Shirou got into dozens of fights (at least 2 dozen IIRC) was in middle school
thanks to Shinji. But that's middle school so it probably has been a year or two since. (Start at 45:45)
Yes Shirou was able to block a few of Lancer's strikes, and he Reinforced that metal poster but Lancer was esentially playing with him right?
EDIT: Looking at his time with Shinji, Shirou could've become a delinquent it seems.