Thoughts on Bava Batra 10b-11b

1)
רבי אבא אמר מהכא (ישעיהו לג, טז) הוא מרומים ישכון מצדות סלעים משגבו לחמו נתן מימיו נאמנים מה טעם מרומים ישכון מצדות סלעים משגבו משום דלחמו נתן ומימיו נאמנים
The derasha might well be also a revocalization, of sela'im mishegavu, *coins* (rather than rocks) when collected.

2)
אלא א"כ ממונה עליה כרבי חנניא בן תרדיון.
See Tosafot. It is a common mistake to judge the value of a person, particularly in the religious sphere, based on a single measure. More accurate would be a vector of characteristics, such as honesty, trustworthiness (like R' Chananya ben Tradyon), mindfulness (like Elisha), empathy, commitment to God, fear of sin, and so on.

3) Rabban Yochanan ben Zakkai had his own understanding of the pasuk, yet still encouraged his students to develop their own paths and their own novel interpretations. Interestingly, almost all the students' interpretations line up and have a novelty only in one feature, based on different prooftexts. And none of these really like up with Rabban Yochanan ben Zakkai's own interpretation.

11b:
אבותי גנזו במקום שהיד שולטת בו ואני גנזתי במקום שאין היד שולטת בו
Wouldn't they have eventually melted?