Of course it's deliberate. But it's not exploitive. It's something incredibly obvious and something anyone with half a brain would do in the course of normal gameplay. Until they realized "uh oh this just ruined the game".
Exploitive is kind of a broad term in this respect. Min/maxing stuff is not strictly exploiting, but it is using the game system to try and make you character as powerful as possible. That's where the having your cake and eating it comes from. People who deliberately doing things to try and make the most powerful character they can and then complaining that some of those things make them overpowered.
Someone... I2edShift, suggested caps for crafting. There would be other ways of limiting as well. That would stop people being able to make overpowered characters at the expense of restricting freedom. Which is what the OP wants. And there are definitely issues with some skills to do with the speed at which the level that could do with some fine tuning. But I tend to prefer a more hands off approach to balance.
If they patched in hard caps on all the caps on the way people are
exploting deliberately maximising results from crafting do you think there'd be more or less people complaining about it?
I guess at the end of the day one of the... well flaws isn't the right word... issues with the TES games is they can never get it it right because by trying to be relatively open and freeform (less so these days, but still a lot to compared to other similar games) and it's impossible to get it just right for the tastes of everyone playing. A lot of this isn't right or wrong with regards to design. It just comes down o personal preference.