This change would make the spec pretty awful at PvE. Doing 4.5k-6.5k damage every 10-12 seconds is already pretty weak in PvE. The damage between smashes averages under 2k dps over that 10-11 seconds. The average DPS between smashes in pvp is probably near 1k. Factors like the jugg needing to close in on someone on foot, using CCs, intercede, etc.
If the devs take the complaints in this post seriously they may put a limit on the number of targets affected by smash. I doubt it though. This would make PvE solo dalies pretty awful on a smash spec.
LOL. Tell me you're just trolling. If you seriously believe that solo dailies should be a factor at class balance... well... I don't know what to say. Not to mention that HEALERS and TANKS do solo dailies! Really, they do! They don't Smash for 7k!
Focus is very strong in PvE. The suggested change would merely require Focus Guardians/Sentinels to have some crit chance on their gear, as opposed to stacking power and strength only.