your wrong. even GOTO says the revans attacks left the republic military and ship factories intact plus he left many key worlds alone like onderon because he didnt want the republic to fall apart
as kriea would say " your not listening to me". she does things like that BIG things like that big but simple at the same time. she does not control your actions your alinement who you kill and who you spare not to mention that in the end you diapoint her by not doing what she thought you would after the masters die and sure influence you and others but she can only point the path in is you who must walk it
well the problem with old people coming back is if they die or were never gained due to alinement or gender so it to diffiecult to make a story from them
hes/shes not evil he sacerificed him self to darkness to gain the power he needed to "save" the galxey he/she is not evil he does what he needed to madder what the cost
revan is true to himself nomadder what mask he wheres sith, jedi, hero what ever role he plays in Kotar 3 it will be for good nomadder how hard it is to see at the moment