I don't know anything about the dev team, product team, support team, etc., for EA...Ware, but I can tell you from my own experience that even things that appear from the outside to be easy are sometimes not easy at all when you're up to your elbows in the code. Assuming they use some form of Agile development, I would guess your changes would be at least 1 maybe 2 PIs just to get to a 'staged for release' position.
In our organization, a PI constitutes roughly a qtr, which means there would be 3-6 months time to implement your suggestions (taken at face value, without any codebase/infrastructure knowledge). I'm assuming the dev team dedicated to pvp being 2-5 people, and if that assumption is even in the ballpark, that is going to put the pricetag between 150k and 300k.
My PM would look at that and ask what the other side of the ledger will be for that player base. I have no idea, but to quote an old boss of mine, it takes a lot of 59 cent tacos to make $1,000. Similarly, it takes a lot of 14.99 subs and even more $5 cartel buys to offset that kind of spend.
I'm not trying to be Johnny Raincloud on your idea, because like I said at the outset, I think your ideas are solid and would DEFINITELY improve pvp gameplay. Rather, I'm just playing devil's advocate here on the business case side, which is going to be a major driver for the powers-that-be who make the decisions.
The Director in me says this is lipstick on a pig.