I can see why you'd be confused by so much for. I found two dictionaries that defined the term, but their definitions are a little tricky to understand.
TFD says:
so much for something
that is the last of something; there is no need to consider something anymore:
It just started raining. So much for our picnic this afternoon.
CDO says:
so much for something
used to express disappointment at the fact that a situation is not as you thought it was:
The car's broken down again. So much for our trip to the seaside.
Both meanings together sum up how the phrase is used pretty well. If I say, "So much for X!" then that means that I'm not going to think about X anymore; it seemed like a good idea for awhile, but now it's not going to happen.
Let's say a basketball team was losing a game by 25 points at halftime, but managed to tie the game with just one minute left. In the end, though, the other team won. Someone might say,
Well, so much for that!
In that case, the word that would refer to the team's comeback. They almost pulled off a win, but in the end they fell short.
As for for the love of, TFD defines that as:
for the love of Pete (or Mike, or God)
An exclamation of surprise, exasperation, or some similar feeling
Going back to the basketball game, let's say the team that was trailing at halftime did come back and win the game. The other team's coach might say,
For the love of God, I can't believe we lost that game!
That phrase doesn't really add any meaning to the sentence, it just adds feeling and emotion to the sentence. I don't think you'll find it used much except in direct quotes.
@Damkerng is correct that the literal meaning is the meaning.
The phrase is to point out that there may be exceptions to the agreement, but they must be explicitly stated, usually in writing. Legal documents try to be as broad as possible in covering as many outcomes/possibilities, and so would not be able to list all possibilities. In such cases, it may be simpler to list the exceptions.
A complementary phrase which gets used is includes, but is not limited to where examples of conditions are listed i.e. water damage, fire damage, wind damage are listed but other conditions may apply
Best Answer
The word summary in your example is not a noun, but an adjective which means:
Summary execution means:
You could find more about summary execution in the Wikipedia article.
[Oxford Online Dictionary]