... or a strengthening product (does anyone actually use those?)...
No.
With most baby jobs, I'm already at 5 gold picks and using such a product doesn't add even a single dollar to my 1 hour payment...
And for jobs where I could really use them they're simply too weak.
My proposal to use percentages of the job's difficulties instead of fixed labor points was turned down more than once
(And they could need a jobs update; eg adding the trading office to the trading buff products etc... - which would only make sense if the percentual idea would find its way back to game designers' minds)
-> Blocking the Character buff slot or even cancelling the current buff [a simple amulet is trice as useful as those products] is a total waste for me.
(Contrary, for a new character below level ~40 they're still useful. But that wouldn't change if you leave the path of fixed LPs ^^ )
...But I'm firmly against the implementation of any new item sets...
That wasn't the point of the question/ suggestion.
It was about replacing the current reward sets by sets from more up to date tombolas (although it shouldn't be the most up to date ones imho), or adding the latter ones in addition to the current rewards.
(Btw, since invention of the travelling fair I got *one* T4 / very rare item - using 2 free plays each day the circus was opened on 4 worlds (up to 7 worlds during my ..eh.. crazy times *g*) - someone else can approximate the chances now ^^ )