Hello Lysium,
so you raised a few points like having alts on the ladder, not enough rewards for people who play a lot & doesn't make it on the ladder and that Top25 players need a special reward.
I will try to explain my POV.
First of all there was a huge PvP Rewards Discussion about a month ago, probably worth reading.
As for the alts on the ladder, my POV is simply git gud; there is no reason why a player should have 3-4 alt accounts on the ladder, this only means that you are not good enough and if someone seriously can hit the ladder 3-4 times then give him some credit for doing so, he doesn't block your way to Top25; you are just not as good he is.
As for the "bonus coins", this is just a horrible idea; this will not only devalue the PVP items, this will also make PVP mounts/PVP cloaks, that were earned fair and square through playing a lot/Top25 finishes, make worth nothing and unspecial. I would go on a rampage if this got implemented since I didn't play a lot of PVP matches to earn my stuff while someone who like played 20 games got the same reward, no ty.