I am also interested to see the on-chart limit orders. If you say you will not add on-chart limit order entry, maybe you can consider adding only the on-chart limit order display, which is very useful when you follow the current price comparing to your limit order, directly on the chart. Now you have to kind of look up (where is the chart) and down (where is your pending limit orders). I understand your point that by entering the orders using the trade box is more accurate, however for following the price fluctuation vs your limit order would be much easier directly on the chart.
Thank you for considering the suggestion.