[overcoil]

changing out your routine is usually considered a good thing, doing the same routine month after month or year after year will probably cause a decline in gains. However, to continue the same routine could maintain or even increase your strength. So you need to analyze and be aware of what is available.
Training agonistic/antagonistic (opposing body parts) muscles (superset style ) is a viable training routine style.
So, the 3x10 set/rep routine is good, though, after months you may start to lack the gains from early on so some type of change may be beneficial for continuing gains, could be singularly a psychological benefit to changing routine or physical benefit or both.
Cautiously there are combination of exercises that are considered potentially injury causing. Deadlifts then Squats are a combination that is frowned upon for a same day or consecutive day workout routine.

1) asking questions and reading qualified information is good.
2) changing out your routine and learning new weight lifting exercise is good.
3) cross-training is good.
4) some people in the gym or on forums don't know anything.
5) don't be influenced or fooled by people using illegal supplements.

The post above mentions COMPOUND EXERCISES and I followed what other people have written and believe Compound Exercises are the building block of weight lifting. Crossfit, no matter what your opinion of, looks to be big into compound exercises.