I don't think it's necessary to do major renovations. Doesn't sound like you have any serious Feng Shui problem. The bright hall should already be good enough to help collect the Qi. Unless the Pillar is DIRECTLY infront of your main door, i don't understand how it is blocking your Qi. And if really is, IMHO the creepy crawler plant is not going to help much.
Kitchen located in the SE sector for your house is fine. It's located in the right sector. I presume you meant the bedroom ABOVE the kitchen, with the bed directly ABOVE the Sink location below. If this is the case, there shouldn't be any problems. I don't see how the sink can affect your bed ONE STOREY up. Unless you are sleeping right next to the sink, I don't think you should be worried.
Warm Regards, JY