Chaosmancer
Legend
Using ability checks to mask your spellcasting? Totally acceptable house rule, but it's nowhere in the RAW. It bypasses what I believe to be a much-needed limitation of spellcasting that levels the playing field a tiny bit when compared to non-spellcasters (without changing the rules). To ignore those components is to make casters even more potent because enemies may never know they are being targeted.
D&D spellcasting components are an amalgamation of activities that are porttrayed in lots of media. It's not just precise hand gestures that need training and practice to get right (like in "The Magicians," or mudras in lots of anime). It's not just speaking the words out loud and waving a wand like in the Wizarding World. It's not just the alchemy of materials to power the casting. It's potentially all of the above.
How I see the narrative? Reality is determined by our (potentially shared) perception, and wielding magic via spellcasting is an intense, focused effort to reshape reality, so you are manifesting your power to challenge not only the perception of everyone witnessing it, but you are convincing reality itself that you mean it.
Right, but look at the plot of Aladdin.
Jafar charms the Sultan. The minutes or hours later the charm wears off and the Sultan realizes he has been charmed. So he orders his guards to capture and execute Jafar.
Sound exciting to you? And sure, you can simply declare that Jafar's staff was a magic item that worked differently, or that Jafar had a different spell, or any number of things, but there are a lot of spells in DnD whose entire purpose is wasted ink if you have to essentially declare to the target and anyone nearby that you are casting a spell on them. And those spells are meant for players.
So, I don't see the increase, because I see the entire point of those spells as being spells which are applied with no one the wiser.