If they raise the cap to yet another bottom-of-bracket level, and keep us from using xp-lock, then it's anything but an improvement.
I wouldn't have a problem with having my trial 24s in the same bracket as an increasing number of 24s with full enchants, if I could also have a 60 on that account, and send my 24s level 300 enchants. Blizzard should be looking at what we want, and finding a way to let us pay for it, besides just subscriptions. We want to play low level BGs, so buying all the expansions and paying for subscriptions is just too much of an investment, for what we want out of the game. The way they should be looking at it is, we're not paying subscriptions, so many of us would be happy to buy a lot of pointless stuff like mounts and pets, because it's easier to justify that if you aren't already spending a lot of money on the subscription.
Personally, I think Blizzard should have the first 60 levels of the game go free to play, supported by microtransactions, with only subscribers getting the next 30. They could stand to make a lot of money from the kind of people who can't afford subscriptions, or who aren't interested in endgame content, by giving the low levels access to paid upgrades.
How about some of these, and the suggested prices? (in addition to accepting paid services on trial accounts):
Raise level cap on the account to 40 and gold cap to 50 (so you can train riding) - $20
Raise level cap on the account to 60 and gold cap to 250 - $40, and also requires the L40 unlock
Raise level of crafting to the next level (limited by the character level limit on the account, that's needed to train it) - $5
Allow XP locking on the account - $10
Allow mail between your own alts (and being able to remove items from the mail) - $10
Permit the trial account to join guilds (and invite guild members only to groups) - $10
Allow the creation of guilds (requires the L60 unlock)- $20 (includes joining)
Guild use would have to be pretty limited to keep them from being used by gold farmers/spammers. There could be no guild bank access, as that would allow trial accounts to be used to farm gold (what little is possible on a L20). Guild joining has to be a payed for feature, otherwise gold spammers could use guild invites like party invites, to spam once they are accepted. Also guild standing and rep rewards would be unusable, as their cost is over the gold cap for the accounts. . Guild master could only be passed to a subscribed account, to keep trial accounts from making guilds for each other, with just one account buying the upgrade.