Its hard to know where England are, except, right where they want to be, in terms of points and mainly in the place they want on injuries - but info is less clear on that of course.
Jones is of course making statements that need to be taken with a pinch of salt. One recent interview - he went on about a strength based game based on traditional strengths, so scrum, lineout etc. Yet of course, the games played in the last 18 months have looked to play a fast multi phased game like the first part of the SA Test 1 in SA, and the first 31 points vs Scotland as examples.
So how England will look to play vs Argentina is not clear to us - and I'd expect only that England's key aim will be to avoid phases of confused and naive play, as demonstrated too often, when opponents have made come backs. Squidge Rugby did an excellent video on this matter, which is a concern, as these comebacks have often been against key teams.
If England have made progress on their ability to react to the changes in a game - then they are serious contenders.