High priority

Fees

Collection
- Simple flat fee set in-config by validators & full nodes - ref #1921
- @sunnya97 working on implementation
- BLOCKER: Blocked on tendermint/tendermint#2275 @ValarDragon
Distribution
- "Piggy bank" fee distribution - ref #1944 (spec)
- @rigelrozanski working on implementation
EST TIMELINE:
- Work on fees should be completed in the v0.25.0 release

Unbonding state for validators (WIP) #2163 @rigelrozanski
- Needs 👀 from @chris
- Should be in v0.25.0 release
Slashing period PR - ref #2122
- Needs 👀 from @cwgoes and @jaekwon
- Should be in v0.25.0 release
Other slashing issues blocking for launch - #1256
Update staking/slashing for NextValSet change
- @cwgoes to start next
Miscellaneous minor staking issues
- List here
- Need to figure out scope of work here to estimate time
- @rigelrozanski to start next

Already implemented on TM side, need simple CLI interface
@alessio working on the SDK side of things here
Need to schedule some time with @alessio, @ebuchman and @ValarDragon this week to finalize feature set/implementation plan

Need to update for new ABCI changes - error string, tags are list of lists, proposer in header (Tendermint 0.24?)
@cwgoes has done some work here. Should be on develop in tendermint w/in next week.
Include in tendermint v0.24.0 release?

Simple transaction benchmarking work by @jlandrews to inform additional work here
Integrate @alessio's simulation work into CLI and LCD
Sanity Checks

Bianje working on implementation (#2147)
- ICS 0,ICS 1, ICS 20 and ICS 21 implemented in this PR ☝️
- @fedekunze, @jackzampolin and @alexanderbez to review
Additional PR incoming for ICS 22 and ICS 23
Include #382

Simple software upgrade proposals
- Implementation described in #1079
- Agree upon a block height to switch to new version
Another Governance proposal from @jaekwon #2116
Circuit breaker
Parameter change proposals (roughly the same implementation as circuit breaker)