I have one word for you - panning
I used to do the same "mistake" a while back while recording tons of instruments.
Never have all of them at the center of your sound... Pan some of them L, some of them R, and balance the amount of different sounds at the same time.
For example, violins 30-40% L, and harps 30-40% R.
If you get it right - the same song will sound much much better. Try it
Apart from that, the already mentioned tempo... you could've set some
of the sounds in a combi and play them all at once so you don't have to
record everything over and over again.
Keep it up