I would actually have to agree with the majority on this one. The macro system is messed up. Personally i never liked the idea of gear swapping in the middle of battle anyway, but SE has decided to move in that direction by creating tons of equipment with stats that serve for just that purpose.
But moving in that direction and then limiting macro's are counter productive of each other. If your playing legitimately, and you have a full gear swap, your looking at around 3 macros. Then a WS macro. Then 3 more macros to get back to what you had. Thats insain. It takes almost an entire book of macros to do a single action.
The botting argument for not wanting to increase macro space never made much sense to me either. (Unless you increased it to like 2000 lines lol) The macros are very simplistic. Its not like you can use an IF - THEN inside one. And if it were increased to 15-20 lines, its still not like u could press a macro and come back in 6 hours and see your character still at it. Alls that does is decrease the amount of times i have to press the key on my keyboard while I'm sitting here forever.
Last point is that the majority of the player base already uses some form of increased macros or spell casts. People that don't use them (like me) are very hard to find. Which means the only ppl really hurting from this are those that are 'playing by the rules'. And thats a pretty bad way to act towards those players that are paying for this.