Can we add some sort of progress bar or "working ..." message in the absence of voluminous messages (difficult); better isolation of messages to set command-line flags
Add more examples, tests, vignettes ... especially a smaller (quicker) data set for the main example
work on predict() method; predictions incl REs
simulate() method
save (more) fitted models in inst/ so they can be used easily in examples without doing the fits each time
speed up (Skaug)
more robust first pass, weighted SS or quasi-likelihood (Fournier)
access to profiling
MCMC fixes: transform correlation parameter
sort out terms, formula methods to make step etc. work properly (check lme4 implementation, add fixed.only=FALSE option?)
would making predictions into sdreport variables give (Wald) CIs that included uncertainty in Var-Corr?
vignette: more on troubleshooting, R2admb intro, importance sample, AGQ, ... ?