WatchList - You can add multiple watchlists in MT. A Watchlist is just another type of portfolio, so on Port Edit screen, click the arrow on the right side of the ADD button and select Watchlist. You then open the window same as any portfolio.
Ticker tape - you actually use it for scrolling or just static? We plan to add a hybrid of the index panel and ticker tape, but were not planning to do the scrolling.
Simultaneous buy/sell - you mean press one button and MT send orders to multiple accounts? That is not likely in the near future. However, you can open multiple trade tickets for same or different accounts now. Also, we plan to add a multi-order window where you can enter multiple orders (one per line) at the same time, then send them either with one click to send all, or with submit button next to each one. The plan is to allow account selection for each of those orders, so one can be to TD Ameritrade, another to IB, etc.