The problem with that, Peter....
...is that most newbie or even intermediate casters won't know what their style is. It can take many months of hard practice and the use of many lines and rods attempting different styles to know what you prefer or excell at.
What might work better is having experienced casters explain how rod/line combos work with certain styles and to what degree of ease or difficulty a certain combination might work with new casters.
For example, a respected and notable person here on the board might speak of the 7141 Sage you mentioned and tell how it casts the airflo delta 7/8 with poly tips easily using an underhand style whereas the same rod with a 6/7 XLT throws long, lovely loops but calls for a bit of experience with throwing long belly lines and requires a caster to be skilled at this to make the rod perform, giving novice casters difficulty.
I'll share a bit of a story here.
A group of high dollar one week a year glory boys (can you say metrosexual?) gathered on a certain river to attend a certain function. All were outfitted with the top brands from head to toe and reel to fly, including having the much touted XLT spooled up on their long rods. Upon observing them it was noted that a great number of these spiffy dudes couldn't throw that long belly worth a darn.
"FLAILING ORANGE" was the word of the day.
I was still just in the learning stage but had a rod and short belly line that an instructor friend had matched up for me and was able to cast 50 to 60 feet with it fairly nicely. I had more than one of these persons approach me and ask for advice. I knew very little and had very little experience, but was set up with something that actually worked for my given abillity. (A Fly Logic 13 foot 8 wt. and delta 8/9)
Merely touting a lines capabillities (and not to knock the XLT, it is great and I own some) does not truly make for a great recomendation. These guys all thought they needed to be throwing the long belly (To be cool? Who knows.) when hands down and to the last man they should all have had something more manageable on.
The moral (besides the fact that dollar output does not translate into skill level) is that 1) they did not know or would not admit their true abillity with that type of line and 2) the hype of that line, true or false, did not translate to the masses that it was one that required a good bit of skill to handle, apparently. This is not the line makers fault, as items in style will be snapped up by the Yup. But if a true tool is to be made to aide the newcomer, it must be assumed that he/she, even if slightly experienced, really does not know what their abillities are and some form of "Ease of use" feature should be incorporated.