"Yield On Cost" YOC
There already is an average cost calculation done for the lots of stock held, why not add a simple 'Yield On Cost (YOC)' calculation to help us longer term investors see how well our long term position in hold for high dividends are doing? A more complicated calculation would be Annualized Yield on Cost or AYOC, giving us a better measurement of how our long position is doing. Then to further combine this we would add/subtract our annualized gain/loss cost return on Equity to our AYOC to get a Net ROE including Dividend Yields. It may not be perfect as you can't track all the prior dividends but it would be close to see if both the growth and income is paying off for longer positions.